12x=144
x+9=6
x+24=16
x-7=-21
x-14=-6
x-(-15)=11
x+10=24
4x=16
-9x=-81
4+x=36
-x/6=-2
x/2=7
x-21=-12
x-4=0
x+10=18
14x=-42
x-6=-10
-6x=48
x/7=-2
-x/8=-4
