Question

Someone please help me, write a variable equation to represent the situation, and solve it by using inverse operations.

Three times the difference between a number and six is eighteen.

Answer 1

Number be x

The equation is

• 3(x-6)=18
• 3x-18=18
• 3x=36
• x=12

Answer 2

• Number is 12

Explanation:

Three times the difference between a number and six is eighteen:

• 3(n - 6) = 18
• n - 6 = 18/3
• n - 6 = 6
• n = 6 + 6
• n = 12