Question

What does y=?? 10 POINTS
y = [ ? ]
5y-20
2y+25

Answer 1

1st one)

y = 4

2nd one)

y = -12.5

Explanation:

5y - 20 = 0

add 20 on both sides:

⇒ 5y - 20 + 20 = 0 + 20

⇒ 5y = 20

divide 5 on both sides

⇒
`(5y)/(y) = (20)/(5)`

⇒ y = 4

2y + 25 = 0

subtract 25 on both sides

⇒ 2y + 25 - 25 = 0 - 25

⇒ 2y = -25

divide 2 on both sides:

⇒
`(2y)/(2) = (-25)/(2)`

⇒ y = -12.5