document.write( "Question 14382: systms of linear equations an problem solving the substituition method
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document.write( "3s-4t=14
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document.write( "5s+t=8 \n" );
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Algebra.Com's Answer #7217 by elima(1433)![]() ![]() ![]() You can put this solution on YOUR website! 3s-4t=14 \n" ); document.write( "5s+t=8 \n" ); document.write( "Lets start with the 2nd equation; \n" ); document.write( "5s+t=8 \n" ); document.write( "solve for t; \n" ); document.write( "t=8-5s \n" ); document.write( "Now go back to first equation and solve for s using the answer we got for t; \n" ); document.write( "3s-4(8-5s)=14 \n" ); document.write( "3s-32+20s=14 \n" ); document.write( "23s=46 \n" ); document.write( "s=2 \n" ); document.write( "Now we have the answer for s, so plug that into equation 1 and find out what t=, \n" ); document.write( "3(2)-4t=14 \n" ); document.write( "6-4t=14 \n" ); document.write( "-4t=8 \n" ); document.write( "t=-2 \n" ); document.write( "=) \n" ); document.write( " |