document.write( "Question 539068: solve the problem. x=7y+7
\n" ); document.write( " 2x-6y=12 \n" ); document.write( "

Algebra.Com's Answer #353328 by Mathpassionate(25) $\"\"$ $\"About$

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solve the problem. x=7y+7
\n" ); document.write( "2x-6y=12\r
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\n" ); document.write( "\n" ); document.write( "We substitute x=7y+7 into 2x-6y=12\r
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\n" ); document.write( "\n" ); document.write( "2x-6y=12\r
\n" ); document.write( "\n" ); document.write( "2*(7y+7)-6y=12
\n" ); document.write( "(2*7y)+(2*7)-6y=12
\n" ); document.write( "14y+14-6y=12
\n" ); document.write( "14y-6y=12-14
\n" ); document.write( "8y=-2
\n" ); document.write( "y=-2/8
\n" ); document.write( "y=-1/4\r
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\n" ); document.write( "\n" ); document.write( "Now, substitute y = -1/4 into x=7y+7\r
\n" ); document.write( "\n" ); document.write( "x=7y+7\r
\n" ); document.write( "\n" ); document.write( "x=7*(-1/4)+7
\n" ); document.write( "x = -7/4 + 7
\n" ); document.write( "x = -7/4 + 28/4 (because 28/4 is the same as 7, but we need common denominators (4)\r
\n" ); document.write( "\n" ); document.write( "x = (-7 + 28)/4
\n" ); document.write( "x = (21)/4
\n" ); document.write( "x = 21/4\r
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\n" ); document.write( "\n" ); document.write( "Then, the answers are:\r
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\n" ); document.write( "\n" ); document.write( "y=-1/4
\n" ); document.write( "x = 21/4\r
\n" ); document.write( "\n" ); document.write( "Any questions, please ask me.\r
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