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dillardgurl
So the equation you would have to set up would be: (3m)+(2m-5)=90.

If your wondering where I got the 90 from I got it because the question states it is a right angle.

So now you combine like terms:

3m+2m=5m

Which leaves you:

5m+(-5)=90 or 5m-5=90

Then you do the opposite operation by changing subtraction to addition:

5m-5=90
+5
(Don’t forget your do the same on the other side)

5m-5=90
+5 +5
—————-

And then your left with:

5m=95

Then you divide by 5 on both sides by creating a fraction:

5m=95
—- —-
5 5

And you get your answer:

m=19




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