Resposta :

x+1+2x= 1-3x
x+1+2x-1+3x=0
x+5x=0
6x=0
x=6

x + 1 + 2x = 1 - 3x 
x + 2x + 3x = 1 - 1
6x = 0
x = 0/6
x = 0

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