document.write( "Question 741688: sir what is (2x)/(3)-(7y)/(2)= -5
\n" ); document.write( "(5x)/(3)-(y)/(2)= 4? \n" ); document.write( "
Algebra.Com's Answer #452120 by rothauserc(4718)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "(2x)/(3)-(7y)/(2)= -5
\n" ); document.write( "(5x)/(3)-(y)/(2)= 4\r
\n" ); document.write( "\n" ); document.write( "1) note that 3 * 2 = 6 is our common denominator, so we can rewrite
\n" ); document.write( " (4x/6) - (21y/6) = -5
\n" ); document.write( " multiply both sides of = by 6
\n" ); document.write( " 4x - 21y = -30\r
\n" ); document.write( "\n" ); document.write( "2) 6 is also the common denominator here, so we rewrite
\n" ); document.write( " (10x/6) - (3y/6) = 4
\n" ); document.write( " multiply both sides of = by 6
\n" ); document.write( " 10x - 3y = 24\r
\n" ); document.write( "\n" ); document.write( "solve 1) for x and we have x = (-30+21y)/4
\n" ); document.write( "substitute for x in 2)\r
\n" ); document.write( "\n" ); document.write( " 10*((21y-30)/4) - 3y = 24
\n" ); document.write( " 5*((21y-30)/2) - 3y = 24
\n" ); document.write( " (105y - 150)/2 - 3y = 24
\n" ); document.write( " 105y - 150 - 6y = 48
\n" ); document.write( " 99y = 198\r
\n" ); document.write( "\n" ); document.write( " y = 2
\n" ); document.write( " 10x - 3*2 = 24
\n" ); document.write( " 10x = 30 and x = 3
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