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(- 5)(7) - ( -3)(10) = Para quitar parentesis aplicas ley de signos.
- por + = -
- 35 - ( - 30) = Aplicas ley de signos - por - = +
- 35 + 30 =
-5
Respuesta.
- 5
(-35)- (-30)
-35 +30
-5