9x-4 (x-3)+72
what is X?

x = 12

Step-by-step explanation:

9*x-4*(x-3)-(72)=0

Step by step solution :

Step  1  :

Equation at the end of step  1  :

 (9x -  4 • (x - 3)) -  72  = 0

Step  2  :

Step  3  :

Pulling out like terms :

3.1     Pull out like factors :

  5x - 60  =   5 • (x - 12)

angle efh= angle egh

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75