document.write( "Question 82441: solve the system by substitution 5x+3y=-17, y=3x-15 \n" ); document.write( "
Algebra.Com's Answer #59100 by checkley75(3666)\"\" \"About 
You can put this solution on YOUR website!
Y=3X-15 NOW WE SUBSTITUTE (3X-15) FOR Y IN THE OTHERE EQUATION & SOLVE FOR X
\n" ); document.write( "5X+3(3X-15)=-17
\n" ); document.write( "5X+9X-45=-17
\n" ); document.write( "14X=-17+45
\n" ); document.write( "14X=28
\n" ); document.write( "X=28/14
\n" ); document.write( "X=2 ANSWER. NOW SUBSTITUTE 2 FOR X IN THE FIRST EQUATION & SOLVE FOR Y
\n" ); document.write( "Y=3*2-15
\n" ); document.write( "Y=6-15
\n" ); document.write( "Y=-9 ANSWER.
\n" ); document.write( "PROOF
\n" ); document.write( "5*2+3*-9=-17
\n" ); document.write( "10-27=-17
\n" ); document.write( "-17=-17 \n" ); document.write( "
\n" );