Question

Please help me out! :)

Answer 1

y = 12.

Explanation:

Cross multiplying:

10(y + 9) = 14*15

10y + 90 = 210

10y = 120

y = 12 (answer).

Answer 2

You can simplify the left hand side:

`(7)/(5) = (y+9)/(15)`

Multiply both sides by 15:

`3\cdot 7 = y+9 \iff 21=y+9`

Subtract 9 from both sides:

`y = 21-9=12`