document.write( "Question 263367: how do i use the the substitution method for 9m+n=24 m-3n=12
\n" ); document.write( "to find the ordered pairs. \n" ); document.write( "
Algebra.Com's Answer #194091 by angphy(3)\"\" \"About 
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9m+n=24- 1st equation
\n" ); document.write( "m-3n=12- 2nd equation
\n" ); document.write( "First, you want to get m by itself in the 2nd equation
\n" ); document.write( "m-3n=12 add 3n to both side of the equation to isoslate m
\n" ); document.write( " +3n +3n
\n" ); document.write( "m=3n+12. then, you can substitute in m in the 1st equation\r
\n" ); document.write( "\n" ); document.write( "9(3n+12)+n=24 solve to find n
\n" ); document.write( "27n+108+n=24
\n" ); document.write( "28n+108=24
\n" ); document.write( " -108 -108
\n" ); document.write( "28n=-84 divide by 28 on both side of the equation to isoslate n
\n" ); document.write( "n=-3\r
\n" ); document.write( "\n" ); document.write( "Put the value of n into the 1st equation
\n" ); document.write( "9m+n=24
\n" ); document.write( "9m+(-3)=24 add 3 to get 9m by itself
\n" ); document.write( " +3 +3
\n" ); document.write( "9m=27 Divide by 9 to isoslate m
\n" ); document.write( "m=3\r
\n" ); document.write( "\n" ); document.write( "Answer:(3,-3)\r
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