Question

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

Answer 1

Answer:

1st one)

y = 4

2nd one)

y = -12.5

Step-by-step explanation:

5y - 20 = 0

add 20 on both sides:

⇒ 5y - 20 + 20 = 0 + 20

⇒ 5y = 20

divide 5 on both sides

⇒ $\frac{5y}{y} = \frac{20}{5}$

⇒ y = 4

2y + 25 = 0

subtract 25 on both sides

⇒ 2y + 25 - 25 = 0 - 25

⇒ 2y = -25

divide 2 on both sides:

⇒ $\frac{2y}{2} = \frac{-25}{2}$

⇒ y = -12.5