We move all terms to the left:
9(2x+15)-(45)=0
We multiply parentheses
18x+135-45=0
We add all the numbers together, and all the variables
18x+90=0
We move all terms containing x to the left, all other terms to the right
18x=-90
x=-90/18
x=-5
(Source: Geteasysolution.com)
(Mark this as the brainliest if it helps!)