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10-4=-2x
6=-2x
x=-3
d)2x-2=7-x
2x+x=7+2
3x=9
x=3
c)-3x=2x-10
-3x-2x=-10
-5x=-10
x=2
b)0,1x=-7
1/10x=-7
x=-70
a)3:4x=-4:9
3/4x=-4/9
x=-16/27