Question

How do you solve `y - 28= -28`?

Answer 1

`y=0`

Explanation:

`-28` is equivalent to `0-28`

Therefore
`color(white)("XXX")color(red)(y)-28 = -28`
is equivalent to
`color(white)("XXX")color(red)(y)-20 = color(red)(0)-28`

and thus
`color(white)("XXX")color(red)(y)=color(red)(0)`