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5x=-10 /:5
x=-2
b
2x-2=7-x
2x+x=7+2
3x=9
x=3
c
10=4-2x
10-4=-2x
6=-2x
x=-3
-3x=2x-10
-3x-2x=-10
-5x=-10
x=2
b)
2x-2=7-x
2x+x=7+2
3x=9
x=3
c)
10=4-2x
2x=4-10
2x=-6
x=-3
e)
2(x+1)=x
2x+2=x
2x-x=-2
x=-2
f)
2t-(3t+1)=6
2t-3t-1=6
-t=6+1
-t=7
t=-7