Question

−9x+9+4=−2x+2−9

Answer 1

put all x on left side and move the rest to the right:
-9x+2x=2-9-9-4
-7x=-20
x= -20/7

Answer 2

Add 2x to both sides of the equal sign getting
-7x+9+4=+2-9
subtract 13 from both sides getting
-7x=-7-13
divide both sides by -7 comb ine
x=20/7