Respuesta :

To begin simplifying, use the distributive property. 

7(3x + 5y) + 5(2x +7y) = 21x + 35y + 10x + 35y

Combine like terms.

21x + 35y + 10x + 35y = 31x + 70y

So, 31x + 70y is the answer.
7(3x+5y)+5(2x+7y)
(21x+35y)+(10x+14y)
31x+49y
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