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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.

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A 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.

Q: How can you write an equation in two variable to solve a problem?

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x + 75 = 501

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 :)

Without an equality sign the given expression can't be considered to be an equation

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.

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.

Related questions

Use a variable to represent the unknown. 'Translate' the words to math symbols and write an equation to solve. Solve the equation. Check.

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.

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?

3n=36 Write the equation n=12 Divide each side of the equation by 3 to get the variable alone.

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Read the problem. Write each fact as a variable expression. Write each fact as a sentence.

4 x .25 = 1

You do not need to write anything to calculate things mentally.

x + 75 = 501

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 :)

I would gingerly perform the step, write the solution,and go on to the next problem.

Without an equality sign the given expression can't be considered to be an equation