Question

resolva a)15y-9y+3+8y+4 b)9-5x+7x+2-3 c) -a+b-5a+2b+5a+b d) 8y-y+5+6-y-5+7

Answer 1

 a)15y-9y+3+8y+4
15y-9y+8y+3+4
14y+7

b)9-5x+7x+2-3
-5x+7x+9+2-3
2x+8

c) -a+b-5a+2b+5a+b
-a-5a+5a+b+2b+b
-a+4b

d) 8y-y+5+6-y-5+7
8y-y-y+5+6+7-5
6y+13

Espero ter ajudado!