Question

Four times a number plus three times a second number is negative nine. Twice the first number plus the second number is three.

Call the first number m and the second number n.

Answer 1

m=9

n=-15

Explanation:

If you set it up in a systems of equations way, ou would have

4m+3n=-9

+ . 2m+n=3

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You would need to cancel out a variable and in my opinion, canceling m out is easier.

4m+3n=-9

+-4m-2n=-6

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0m+n=-15

n=-15

you then plug this into one of the equations, (in my opinion the 2nd one is easier)

2m-15=3

2m=18

m=9

this gives you m so you can get the answer

m=9 and n=-15