Question

Me ajudem pfv a responder :)

A) 7y+5-y+8= 31
B) 5•(3-2a) = 55

Answer 1

A) 7y + 5 - y + 8 = 31
7y - y = 31 - 5 - 8
6y = 18
y = 18/6
y = 3

B) 5.(3-2a) = 55
15 - 10a = 55
- 10a = 55 - 15
- 10a = 40
a = 40/-10
a = -4

Answer 2

A) 7y+5-y+8=31
7y-y=31-8-5
6y=31-13
6y=18
y=18/6
y=3

B)5(3-2a)=55
15-10a=55
-10a=55-15
-10a=40
-a=40/10
-a=4
a=-4