document.write( "Question 429477: solve each system of equations by substitution help i cant figure this out i have the formulas but dont seem to work out right\r
\n" ); document.write( "\n" ); document.write( "5x+10y=20
\n" ); document.write( "2x+6y=10\r
\n" ); document.write( "\n" ); document.write( "6y=-2x+10
\n" ); document.write( "y=-1/3x +5/3
\n" ); document.write( "5x+10(1/3x+5/3)=20
\n" ); document.write( "5x+ \n" ); document.write( "
Algebra.Com's Answer #298300 by mananth(16946)\"\" \"About 
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5 x + 10 y = 20 .............1
\n" ); document.write( "2 x + 6 y = 10 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -3
\n" ); document.write( "Multiply (2) by 5
\n" ); document.write( "-15 x + -30 y = -60
\n" ); document.write( "10 x + 30 y = 50
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\n" ); document.write( "Add the two equations
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\n" ); document.write( "-5x=-10
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\n" ); document.write( "/-5
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\n" ); document.write( "x=2
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\n" ); document.write( "plug value of x in (1)
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\n" ); document.write( "5x+10y=20
\n" ); document.write( "10+10y= 20
\n" ); document.write( "10y=20-10
\n" ); document.write( "10y=10
\n" ); document.write( "y=1
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\n" ); document.write( "CHECK
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\n" ); document.write( "5x+10y= 20
\n" ); document.write( "10+10 =20
\n" ); document.write( "20 = 20 \r
\n" ); document.write( "\n" ); document.write( "The rest of them are to be solved in the same way
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