Resolva as equações considerando U=ℚ (como resolvo??)
b) 3.(x+1) =8
c) 4.(x-6)= -3
d) 2.(3-x)= -4.(x-1)
e) -1.(x+4)= 3.(x+5)
f) 3.(​↓↓- x) - (-2x+7) = -3
[tex] \frac{1}{3} [/tex]


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