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2x + 2 - 2 + 2x = - 2x + 4
2x + 2x + 2x = +4 + 2 - 2
6x = + 4
x = 4/6
x = 2/3
2x +2x+2x =4+2-2
6x=4
x=4/6
x=2/3
espero te sirve y entiendas ;) ☺