document.write( "Question 675494: solve each system by substitution
\n" ); document.write( "{3a+b=3
\n" ); document.write( "{2a-5b=-15 \n" ); document.write( "

Algebra.Com's Answer #419899 by ReadingBoosters(3246) $\"\"$ $\"About$

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3a+b=3
\n" ); document.write( "2a-5b=-15
\n" ); document.write( "...
\n" ); document.write( "b = 3-3a
\n" ); document.write( "2a - 5(3-3a) = -15
\n" ); document.write( "2a - 15 + 15a = -15
\n" ); document.write( "17a = -15 + 15
\n" ); document.write( "17a = 0
\n" ); document.write( " $\"highlight_green%28a+=+0%29\"$
\n" ); document.write( "...
\n" ); document.write( "3(0) + b = 3
\n" ); document.write( " $\"highlight_green%28b+=+3%29\"$
\n" ); document.write( ".....................
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