a) -6x - (8-4x) =7 + (x-3)
-6x -8 +4x = 7 +x-3
-2x - 8 =4 +x
-12 = 3x
x= -4
b)3x-(5x-21)=6x+(9-4x)
3x -5x +21 = 6x +9 -4x
-2x +21 = 2x +9
12 = 4x
x= 3
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a) -6x - (8-4x) =7 + (x-3)
-6x -8 +4x = 7 +x-3
-2x - 8 =4 +x
-12 = 3x
x= -4
b)3x-(5x-21)=6x+(9-4x)
3x -5x +21 = 6x +9 -4x
-2x +21 = 2x +9
12 = 4x
x= 3