Question

12=24-y
solve each equation mentally​

Answer 1

y=12

Explanation:

12=24-y

-24 -24

------------

-12=-y

12=y

If y were a number you would have to find a number to make this equation true. 12 is the correct answer.

Answer 2

y=12

Explanation:

Move y to the left side so it's positive and move 12 to the right:

y=24-12

y=12

It's very simple and you can do it in your head easily.

:)