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2(x+3)-2(5-x)=7x+2

Răspuns :

Niki27
2x+6-10+2x=7x+2
4x-4=7x+2
4x-7x=2+4
-3x=6
X=-2
Chebacandrei
2x(x+3)-2x(5-x)=7x+2
2x×+2×3-2x(5-x)=7x+2
2x×+2×3-2x(5-x)=7x+2
2x+6-(2×5-2x×)=7x+2
2x+6-(10-2x)=7x+2
2x+6-10+2x=7x+2
4x-4=7x+2
4x-7x=2+4
-3x=6
x=6÷-3
x=-2