document.write( "Question 114983: x=3y+7
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document.write( "x+y=-5\r
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document.write( "Could someone show me step by step. I am not clear on how to do this yet. \n" );
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Algebra.Com's Answer #83674 by elima(1433)![]() ![]() ![]() You can put this solution on YOUR website! Since you do not give any directions of how the teacher wants it solved, I will go ahead and solve it by substitution; \n" ); document.write( "x=3y+7 \n" ); document.write( "x+y=-5 \n" ); document.write( "============ \n" ); document.write( "Since we already have one of the equations solved for x, lets substitute x in the other equation with that; \n" ); document.write( "(3y+7)+y=-5 \n" ); document.write( "4y+7=-5 \n" ); document.write( "4y=-12 \n" ); document.write( "y=-3 \n" ); document.write( "------------------- \n" ); document.write( "now we have what y =, so we can use that in either equation and solve for x; \n" ); document.write( "x=3(-3)+7 \n" ); document.write( "x=-9+7 \n" ); document.write( "x=-2 \n" ); document.write( "------------------- \n" ); document.write( "Let me know if you need it solved another way \n" ); document.write( ":) \n" ); document.write( " |