document.write( "Question 99604: Solve the system of equations using the elimination method. \r
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document.write( "2a + 3b = -1 \r
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document.write( "3a + 5b = -2 \n" );
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Algebra.Com's Answer #72459 by elima(1433)![]() ![]() ![]() You can put this solution on YOUR website! With the elimination method, we want to eliminate one of the variables; \n" ); document.write( "2a + 3b = -1 \n" ); document.write( "3a + 5b = -2 \n" ); document.write( "We will multiply the first equation with -3 and the second with 2, so we can eliminate the a; \n" ); document.write( "-3(2a+3b=-1) \n" ); document.write( "2(3a+5b=-2) \n" ); document.write( "new equations; \n" ); document.write( "-6a-9b=3 \n" ); document.write( "6a+10b=-4 \n" ); document.write( "Add the two equations together, and you can eliminate the a; \n" ); document.write( "b=-1 \n" ); document.write( "Now plug the -1 into one of the original equations; \n" ); document.write( "2a+3(-1)=-1 \n" ); document.write( "2a-3=-1 \n" ); document.write( "2a=2 \n" ); document.write( "a=1 \n" ); document.write( ":)\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |