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B) 9
C) -2
D) -8
E) -
F) -10
-7-21=7x
-14=7x
-2=x
b) 28= -7(x-5)
28= -7x+35
7x=35-28
7x=7
x=1
c) -8x-80= -64
-80+64=8x
-16=8x
-2=x
d) x-4=6(-2)
x-4= -12
x= -12+4
x= -6
e) -24=(3x)
-24=3x
-8=x
f) 4x=8(-5)
4x= -40
x= -10