<PRE><B>Question 250938</B>
Rearrange the first equation so that n=13-3m

SUBSTITUTE the rearranged equation into the second equation for n.

The second equation then becomes m-2(13-3m)=23

Use the DISTRIBUTIVE property so that this equation becomes

m-2*13+2*3m = 23  (REMEMBER - negative times a negative is a negative)

We now have m-26+6m = 23

The next step is to combine like terms

We now have 7m - 26 = 23

Add 26 to each side of the equation so that

7m = 49.  Divide both sides of the equation by 7 so that m = 7

Substitute this value for m into the first equation to solve for n.

We now have 3*7+n=13

Therefore n = 13-3*7= 13-21 = -8

So m = 7 and n = -8

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