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2x+(-5)=-13
2x-5=-13
2x=-13+5
2x=-8
x= -4
Sea el número "x"
El doble del número es "2x"
El doble del numero adicionado con -5 es "2x + -5)
2x + -5 = -13
2x = -13 + 5
2x = -8
x = -8/2
x = -4