Answer:
Lets flip the equation so that it is more aesthetically pleasing for us
y + 3 = 21 + 11
Ok first of all, we cna add 21 and 11 to get 32
y + 3 = 32
We want to get y all by itself, so we are going to take away the 3.
We are going to put that 3 into the 32, but remember we are subtracting :)
y = 29
There is your answer! :)
Explanation: