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
⇒ [tex]\frac{5y}{y} = \frac{20}{5}[/tex]
⇒ y = 4
2y + 25 = 0
subtract 25 on both sides
⇒ 2y + 25 - 25 = 0 - 25
⇒ 2y = -25
divide 2 on both sides:
⇒ [tex]\frac{2y}{2} = \frac{-25}{2}[/tex]
⇒ y = -12.5
