document.write( "Question 174019: I'm not sure how to do this problem, it asks to solve by system of equations.
\n" ); document.write( "x+7y=8
\n" ); document.write( "x=6-7y
\n" ); document.write( "I think the equal signs being in different places has me confused. \n" ); document.write( "

Algebra.Com's Answer #128923 by solver91311(24713) $\"\"$ $\"About$

You can put this solution on YOUR website!
Your system is set up to be solved using the substitution method. The second equation gives you an expression that is equal to $\"x\"$ , so you can just substitute that expression in place of $\"x\"$ in the first equation, leaving you with an equation in a single variable, $\"y\"$ , that can be solved by ordinary methods. $\"cartoon%28red%28x%29%2B7y=8%2Cred%286-7y%29%2B7y=8%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "Remember, if in the process of solving a system you obtain an absurd result, something like $\"3=0\"$ , that means that you have an inconsistent system. In other words, the solution set of the system is the empty set. Graphically speaking, the equations represent two straight lines that are parallel and so never intersect. \n" ); document.write( "

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