Write the following as an equation, using x for the unknown number. Then solve.
-When 2 times a number is subtracted from 7 times the number, the result is 40. Find the number.
A)2(x - 7)= 40x; 2.7
B)2x(7 - x)= 40; -8
C)7x - 2x = 40; 8
D)2x + 8x = 40; 5

Question

Quizplus · Accepted Answer

The equation should be: 7x - 2x = 40, as "2 times a number" means 2x and "7 times the number" means 7x. 
Simplifying, we get 5x = 40, and solving for x, x = 8. Therefore, the number is 8. We can translate the given statement into the equation: 7x - 2x = 40
Simplifying the equation, we get 5x = 40
Dividing both sides by 5, we get x = 8. 
Therefore, the number is 8. Option C is the correct equation and solution.

Write the Following as an Equation, Using X for the Unknown