Question

Solve 2(3x + 9) = 4x + 72

What is the value of x?

Answer 1

x = 27

Explanation:

`2(3x+9)=4x+72\qquad\text{use distributive property}\ a(b+c)=ab+ac\\\\(2)(3x)+(2)(9)=4x+72\\\\6x+18=4x+72\qquad\text{subtract 18 from both sides}\\\\6x=4x+54\qquad\text{subtract 4x from both sides}\\\\2x=54\qquad\text{divide both sides by 2}\\\\x=27`