Write the following as an equation, using x for the unknown number. Then solve.
-If 3 times a number is added to -9, the result is equal to 12 times the number. Find the number.
A) 12(3x - 9) = -9; -1
B) 3x + (-9) = 12x; -1
C) 4x + (-9) = 12x; 1
D) 15x - 12x = 9; 1

Question

Quizplus · Accepted Answer

The correct equation that represents the given statement is 3x + (-9) = 12x. Solving for x, we subtract 3x from both sides to get -9 = 9x, and then divide by 9 to find x = -1.

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