<PRE><B>Question 263367</B>
9m+n=24- 1st equation
m-3n=12- 2nd equation
First, you want to get m by itself in the 2nd equation
m-3n=12   add 3n to both side of the equation to isoslate m
 +3n +3n
m=3n+12. then, you can substitute in m in the 1st equation

9(3n+12)+n=24 solve to find n
27n+108+n=24
28n+108=24
   -108 -108
28n=-84   divide by 28 on both side of the equation to isoslate n
n=-3

Put the value of n into the 1st equation
9m+n=24
9m+(-3)=24 add 3 to get 9m by itself
    +3  +3
9m=27  Divide by 9 to isoslate m
m=3

Answer:(3,-3)


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