-12x-9+7x=26
-12x + 7x =26 + 9
-5x = 35 divide both sides by -5
x = 35 /-5
x= -7
-12x-9+7x=26 Combine Like Terms.
-5x-9 = 26 Add 9 to both sides.
-5x = 35
Do the last bit yourself. Trust me, it's easy.
