Решите уравнения:

а) (5x-3)+(7x-4)=8-(15-11x);

б) (4x+3)-(10x+11)=7+(13-4x);

в) (7-5x)-(8-4x)+(5x+6)=8;

г) (3-2x)+(4-3x)+(5-5x)=12+7x;

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