Question

some a expressoes algebricas (7a + 4b ) + (5a - 3b)

Answer 1

(7a + 4b ) + (5a - 3b)

= 7a + 4b - 5a + 3b

= 7a - 5a  + 4b + 3b

= 2a + 7b



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Gannicus
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Answer 2

( 7a + 4b) + ( 5a - 4b) eliminando parenteses
7a + 4b + 5a - 4b      agrupando termos semelhantes
7a + 5a + 4b - 4b
+ 12a