Qual é a raiz das equações:  a) 7x - 2 = -4x + 5
b) 5x -4 = 7 - 8x
c) 8x-8=6x-12
d) 4m-6m=5m+3
e) 3 (2x-1)=6 

PARA AMANHÃ, ME AJUDEM POR FAVOR
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