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3(x+3)+5(x+1)-4x-6=3x+14

Răspuns :

3(x+3)+5(x+1)-4x-6=3x+14
3x+9+5x+5-4x-6-3x-14=0
x-6=0
x=6
3(x+3)+5(x+1)-4x-6=3x+14
3x+9+5x+5-4x-6=3x+14
5x-4x+3x-3x=14-8
x=6