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5X-2X=-18-15
3X=-33
X=-33/3
X=-11
B)
5X-10X+X=12+12
6X=24
X= 24/6
X=4
C)
36-6=3X+X-2X
30=2X
30/2=X
X=15
5x +15 = 2x -18 5x -12 -10x = -x +12 2x -6 = 3x -36 + x
5x-2x = -18-15 5x -10x +x = 12 +12 2x - 3x-x = -36 + 6
3x = -33 -4x = 24 - 2x= -30
x =-33/3 x = 24/-4 x= -30/-2
x = -11 x = -6 x= 15