document.write( "Question 536436: solve by the substitution method 7m+n=10 m-6n=26 the solution is.
\n" ); document.write( "-7x+3y=4 -2x+y=10 the solution
\n" ); document.write( "9x+8y=29 -7x+y=28 the solution
\n" ); document.write( "I really need some help. I dont understand how to do this
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Algebra.Com's Answer #352378 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
solve by the substitution method
\n" ); document.write( "7m+n=10
\n" ); document.write( "m-6n=26 --> m = 6n + 26
\n" ); document.write( "Sub for m in the 1st eqn
\n" ); document.write( "7m + n = 10
\n" ); document.write( "7(6n+26) + n = 10
\n" ); document.write( "42n+182 + n = 10
\n" ); document.write( "43n = -172
\n" ); document.write( "n = -4
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\n" ); document.write( "m = 6n + 26
\n" ); document.write( "m = 2
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\n" ); document.write( "-7x+3y=4 -2x+y=10
\n" ); document.write( "Solve for y in the 2nd eqn, sub into the 1st.
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\n" ); document.write( "9x+8y=29 -7x+y=28
\n" ); document.write( "Same thing.
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