document.write( "Question 180513: 5x-y=-18
\n" ); document.write( "4x+2y=92
\n" ); document.write( " These are both the same problem.I don't get how to do these problems.Could you explain to me how to do this type of problem please?
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Algebra.Com's Answer #135293 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
What they are is 2 equations with 2
\n" ); document.write( "unknowns, so I can assume you are to
\n" ); document.write( "solve for \"x\" and \"y\"
\n" ); document.write( "(1) \"5x+-+y+=+-18\"
\n" ); document.write( "(2) \"4x+%2B+2y+=+92\"
\n" ); document.write( "They should be solvable. If I graph them,
\n" ); document.write( "they are 2 intersecting straight lines
\n" ); document.write( "and the solution, (x,y) is where they
\n" ); document.write( "intersect. I'll graph them
\n" ); document.write( "\"+graph%28+500%2C+500%2C+-50%2C+50%2C+-50%2C+80%2C+5x+%2B+18%2C-2x+%2B+46%29+\"
\n" ); document.write( "Looking at the graph, the intersection is at about \"x+=+4\",
\n" ); document.write( "\"y+=+38\", so the solution would be (4,38)
\n" ); document.write( "Now I'll find the actual solution
\n" ); document.write( "(1) \"5x+-+y+=+-18\"
\n" ); document.write( "(2) \"4x+%2B+2y+=+92\"
\n" ); document.write( "Multiply both sides of (1) by \"2\" and add the equations
\n" ); document.write( "(1) \"10x+-+2y+=+-36\"
\n" ); document.write( "(2) \"4x+%2B+2y+=+92\"
\n" ); document.write( "\"14x+=+56\"
\n" ); document.write( "\"x+=+4\"
\n" ); document.write( "Now put this value of \"x\" back into (1)
\n" ); document.write( "(1) \"10x+-+2y+=+-36\"
\n" ); document.write( "\"10%2A4+-+2y+=+-36\"
\n" ); document.write( "\"40+-+2y+=+-36\"
\n" ); document.write( "\"2y+=+40+%2B+36\"
\n" ); document.write( "\"2y+=+76\"
\n" ); document.write( "\"y+=+38\"
\n" ); document.write( "So, I guessed right. The solution is
\n" ); document.write( "(4,38), or in other words,
\n" ); document.write( "\"x+=+4\"
\n" ); document.write( "\"y+=+38\"\r
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