mostrar que x+(x+3)=(x+2)-x+1). me ajude :*)
x +x+3 = x+2 - x +1
x+x-x = 2 +1 - 3
x = 3-3
x=0
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x +x+3 = x+2 - x +1
x+x-x = 2 +1 - 3
x = 3-3
x=0