document.write( "Question 969444: Solve and then check the system of equations by substitution method. SHOW ALL WORK STEP BY STEP!\r
\n" ); document.write( "\n" ); document.write( "4a+7b=2
\n" ); document.write( "5a+b=-13 \n" ); document.write( "
Algebra.Com's Answer #592365 by MathTherapy(10556)\"\" \"About 
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\n" ); document.write( "Solve and then check the system of equations by substitution method. SHOW ALL WORK STEP BY STEP!\r
\n" ); document.write( "\n" ); document.write( "4a+7b=2
\n" ); document.write( "5a+b=-13
\n" ); document.write( "
4a + 7b =    2 -------- eq (i)
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document.write( "5a +  b = - 13______\"b+=+%28-+13+-+5a%29\" -------- eq (ii)
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document.write( "4a + 7(- 13 - 5a) = 2 ------ Substituting - 13 - 5a for b in eq (i)
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document.write( "4a - 91 - 35a = 2
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document.write( "4a - 35a = 2 + 91
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document.write( "- 31a = 93
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document.write( "\"highlight_green%28a+=+-+93%2F31%29\"
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document.write( "Substitute \"-+93%2F31\" for a in eq (i) or eq (ii) to determine value of b \n" );
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