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How can you write an equation in two variable to solve a problem?
Wiki User
∙ 8y ago
If there are two variables, you'll usually need two equations in the two variables, to be able to find a specific solution.
How you write the equation depends on the specific problem. In general, it requires some practice, to be able to convert a word problem into mathematical equations.
Wiki User
∙ 9y ago
Wiki User
∙ 8y agoA linear equation in two variables will give an infinite number of solutions. These will comprise the coordinates of points along a straight line in 2-dimensional space.
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Using x as the variable write the equation or inequality that would correctly solve this problem A savings account increased by 75 is now more than 500 What is the least amount of money that w?
x + 75 = 501
What 2 number multiply to 800 and add to get -70?
Instead of just giving you the answer, I'll tell you how to solve the problem. To solve this problem, write two equations. Let one variable be x and the other y. Then you can say: xy = 800 x + y = -70 Isolate x + y = -70 for y and you get y = -70-x Then plug it back into the first equation, solve for x and plug your answer into the second equation to solve for y. Hope that helps, and let me know if you have any questions :)
Solve 3w plus 2 20 can you write a real word problem that this equation represents?
Without an equality sign the given expression can't be considered to be an equation
What are steps in practical problem solving?
Which of the following are steps in practical problem solving? Assign an identifying variable to the quantity to be found. Make a guess at the value of the variable. Write a sentence stating conditions placed on the quantity. Check if the value is correct. Solve the sentence for the variable.
Two numbers have a product of 20 and a sum of 9?
To solve this question use a two variable system of equations. First assign a variable to each number: a=first number b=second number Then use the information in the problem to write two equations They have a product of 20 translates to: a x b =20 They have a sum of 9 translates to: a + b =9 Use the method of substitution. Isolate one variable in the 1st equation: a= 20/b Plug it into the 2nd equation: (20/b) + b = 9 Solve for b: b = 5 Now put b back into the 2nd equation: a + 5=9 Solve for a: a = 4 So the solution is 4 and 5.
How do you solve word problems using variables?
Use a variable to represent the unknown. 'Translate' the words to math symbols and write an equation to solve. Solve the equation. Check.
How does writing equivalent equations help you solve a system of equations?
You can write an equivalent equation from a selected equation in the system of equations to isolate a variable. You can then take that variable and substitute it into the other equations. Then you will have a system of equations with one less equation and one less variable and it will be simpler to solve.
What do the variable stand for write an equation and solve for this problem a sewing project requires material costing 44 plus soe tassels. if the material and tassles are to be purchased with fo?
how can you specify what the variable stand for, write and equation, and solve this problem. a sewing project requires material costing $44 plus some tassels. if the material and tassels are to be purchased with four $20 bills, how many tassels can be purchased if they cost $2.40 each?
How do you solve 3n equals 36?
3n=36 Write the equation n=12 Divide each side of the equation by 3 to get the variable alone.
What step should you do before you write an equation to solve a word problem?
you shall add
What are the steps when formulating an equation?
Read the problem. Write each fact as a variable expression. Write each fact as a sentence.
Write an equation to solve this problem what number is 25 percent of 4?
4 x .25 = 1
What do you need to write in order to calculate things?
You do not need to write anything to calculate things mentally.
Using x as the variable write the equation or inequality that would correctly solve this problem A savings account increased by 75 is now more than 500 What is the least amount of money that w?
x + 75 = 501
What 2 number multiply to 800 and add to get -70?
Instead of just giving you the answer, I'll tell you how to solve the problem. To solve this problem, write two equations. Let one variable be x and the other y. Then you can say: xy = 800 x + y = -70 Isolate x + y = -70 for y and you get y = -70-x Then plug it back into the first equation, solve for x and plug your answer into the second equation to solve for y. Hope that helps, and let me know if you have any questions :)
How would you solve a 1 step equation?
I would gingerly perform the step, write the solution,and go on to the next problem.
Solve 3w plus 2 20 can you write a real word problem that this equation represents?
Without an equality sign the given expression can't be considered to be an equation
