7(x-3)-2(x-1)-3=13
7x-21 -2x+2-3=13
7x-2x=13+21-2+3
5x=35
35/5
respuesta 7
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respuesta
7(x-3)-2(x-1)-3=13
7x-21 -2x+2-3=13
7x-2x=13+21-2+3
5x=35
35/5
respuesta 7