document.write( "Question 969199: Solve and then check the system of equations by substitution method. SHOW ALL WORK AND ALL STEPS\r
\n" ); document.write( "\n" ); document.write( "4a+7b=2
\n" ); document.write( "5a+b=-13
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Algebra.Com's Answer #592190 by Alan3354(69443)\"\" \"About 
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4a+7b=2
\n" ); document.write( "5a+b=-13
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\n" ); document.write( "Solve the 2nd eqn for b
\n" ); document.write( "b = -5a - 13
\n" ); document.write( "----
\n" ); document.write( "Sub for b in the 1st equation.
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