document.write( "Question 1046442: Solve the system of equations by the substitution method. (If there is no solution, enter NO SOLUTION.)
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document.write( "{0.25x + 0.4y = −3
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document.write( "{0.5x − 0.6y = 8 \n" );
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Algebra.Com's Answer #662131 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! {0.25x + 0.4y = −3 \n" ); document.write( "{0.5x − 0.6y = 8\r \n" ); document.write( "\n" ); document.write( "Multiply the top by -2, and the x will be the same with opposite signs. \n" ); document.write( "-0.50x-0.8y=6 \n" ); document.write( "0.5x-0.6y=8. Now add them. \n" ); document.write( "-1.4y=14 \n" ); document.write( "y=-10 \n" ); document.write( "Substitute into the first to get x \n" ); document.write( "0.25 x-4=-3 \n" ); document.write( "0.25x=-1 \n" ); document.write( "x=-4\r \n" ); document.write( "\n" ); document.write( "Check by using the second \n" ); document.write( "2-(-6)=8 checks. \n" ); document.write( "(4,-10) are the solutions. \n" ); document.write( " |