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16-06-2017
Mathematics

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Simplify -(-2a + 13) + (-9a - 2) - (-7a - 3).

Respuesta :

16-06-2017

-(-2a+13)+(-9a-2)-(-7a-3)
2a-13-9a-2+7a+3
2a-9a+7a-13-2+3
-7a+7a-15+3
=-12

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16-06-2017

-(-2a+13)+(-9-2)-(-7a-3)

-(-2a+13)-9a-2-(-7a-3)

Distribute the negative sign

-(-2a+13)-9a-2+-1(-7a-3)

-(-2a+13)+-9a+-2+-1(-7a)+(-1)(-3)

-(-2a+13)+-9a+-2+7a+3

Distribute

2a+-13+-9a+-2+7a+3

Combine like terms

2a+-13+-9a+-2+7a+3

(2a+-9a+7a)+(-13+-2+3)

=-12

Answer Link

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