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calculati:
-4(x-2)=-6
-2^2+3(x+5)=x+8
2(x-1)-5x=18-7x
coroana!!


Răspuns :

-4x+8=-6
-4x=-14 =>x=14/4=7/2

-4+3x+15=x+8
3x-x=8-11
2x=-3 =>x=-3/2

2x-2-5x=18-7x
-3x+7x=18+2
4x=20 =>x=5