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2x+8+6x=8
8x=8-8
8x=0/:8
x=0
b) 5x-2(x+4)=10
5x-2x-8=10
3x=10+8
3x=18/:3
x=6
c)-4+4(2-5x)=-9
-4+8-20x=-9
-20x=-9-8+4
-20x=-13/:(-20)
x=13/20
x=0,65
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