4X-10=2X+2
4x-2x=2+10
2x= 12
x= 12/2
x=6
4X-7=8X-2
4x -8x = -2 +7
-4x= +5.(-1)
+4x= -5
x= -5/4
2X+1=4X-7
2x -4x= -7 -1
-2x= -8.(-1)
+2x = +8
x= 8/2
x= 4
9X+9+3X=15
9x +3x = 15 -9
12x= 6
x= 6/12 simplificando 6 e 12 por 6
x= 1/2
16X-1=12X+3
16x -12x = +3 +1
4x= 4
x= 4/4
x= 1
3X-2=4X+9
3x -4x=9 +2
-x= 11.(-1)
x= -11
