document.write( "Question 216082: How would you solve this problem? I need step by step on how it was solved please. 0.3x-0.2y=4
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document.write( " 0.4+ 0.5y= -55over 7\r
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document.write( "What is the solution of the system? \n" );
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Algebra.Com's Answer #163203 by stanbon(75887) ![]() You can put this solution on YOUR website! How would you solve this problem? I need step by step on how it was solved please. 0.3x-0.2y=4 \n" ); document.write( "0.4+ 0.5y= -55over 7 \n" ); document.write( "What is the solution of the system? \n" ); document.write( "----------------------------- \n" ); document.write( "Get rid of those pesky decimals. \n" ); document.write( "----------- \n" ); document.write( "3x - 2y = 40 \n" ); document.write( "4x + 5y = 79 \n" ); document.write( "------------ \n" ); document.write( "Multiply the 1st Eq. by 5 ; Multiply the 2nd Eq. by 2 \n" ); document.write( "--- \n" ); document.write( "15x - 10y = 200 \n" ); document.write( " 8x + 10y = 158 \n" ); document.write( "----------------------- \n" ); document.write( "23x = 358 \n" ); document.write( "x = 15.56.. \n" ); document.write( "--- \n" ); document.write( "Subtitute to solve for \"y\": \n" ); document.write( "3(15.56) - 2y = 40 \n" ); document.write( "-2y = -6.68 \n" ); document.write( "y = 3.34 \n" ); document.write( "---------------------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |