document.write( "Question 249994: Solve each system by substitution. Check your solution.\r
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document.write( "19.
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document.write( "a-1.2b=-3
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document.write( "0.2b+0.6a=12 \n" );
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Algebra.Com's Answer #181980 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! a-1.2b=-3 or a=1.2b-3 \n" ); document.write( "0.2b+0.6a=12 \n" ); document.write( ".2b+.6(1.2b-3)=12 \n" ); document.write( ".2b+.72b-1.8=12 \n" ); document.write( ".92b=12+1.8 \n" ); document.write( ".92b=13.8 \n" ); document.write( "b=13.8/.92 \n" ); document.write( "b=15 ans. \n" ); document.write( "a=1.2*15-3 \n" ); document.write( "a=18-3 \n" ); document.write( "a=15 ans. \n" ); document.write( "Proof: \n" ); document.write( ".2*15+.6*15=12 \n" ); document.write( "3+9=12 \n" ); document.write( "12=12 \n" ); document.write( " |