Question

12. Nine more than y is twenty one.​

Answer 1

y=12

Explanation:

y+9=21 (this would be the formula)

-9 -9 (you want to eliminate 9 from the equation, so subtract it from both sides of the equation)

y=12 (after subtracting 9 from both sides you are left with 12)

Check it

12+9=21 (is this true?)

21=21 (yes it is true, therefore y=12)

Answer 2

y+9=21

Explanation:

9 more than y equals 21.