13. mis the midpoint of pr, pm = 2x + 5, and mr = 4x – 7. solve for x and find pr.

Add 2x + 5 and 4x - 7

Then you isolate the variable or “get rid of” the numbers that re stopping you from getting “x”.

By doing the inverse operation.

If you add ___ you subtract it form itself

If you subtract ___ you add To itself.

So you Cancel out by getting rid of the other numbers.

Same thing with multiplying and dividing.

If you multiply you divide___ but don’t divide “x”

Only the integer.

If you divide you multiply it