Resolva as seguintes equaçoes do 1º grau com uma incognita em R : a)  3x+7=x-3
b) 4x-1=3x+2
c) 2(x-1)-2(x-2)= - (x-3)
d) 2(x-1)=7+x
e) 3-(2x-1) = 3 (-2x-1
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