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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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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.
