document.write( "Question 1035359: -x+y=4 3x-2y=-7 using substitution \n" ); document.write( "
Algebra.Com's Answer #650147 by Cromlix(4381)\"\" \"About 
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Hi there,
\n" ); document.write( "-x+y=4 3x-2y=-7 using substitution
\n" ); document.write( ".........
\n" ); document.write( "-x+y=4......(1)
\n" ); document.write( "3x-2y=-7....(2)
\n" ); document.write( "Using Equation(1)
\n" ); document.write( "-x + y = 4
\n" ); document.write( "Adjust to isolate y
\n" ); document.write( "y = 4 + x.....(1)
\n" ); document.write( "Now, substitute (4 + x) for y
\n" ); document.write( "in Equation(2)
\n" ); document.write( "3x - 2y = -7....(2)
\n" ); document.write( "3x - 2(4 + x) = -7
\n" ); document.write( "3x - 8 -2x = -7
\n" ); document.write( "Collect like terms:
\n" ); document.write( "3x - 2x = -7 + 8
\n" ); document.write( "x = 1
\n" ); document.write( "Substitute x = 1 into
\n" ); document.write( "Equation(1)
\n" ); document.write( "-x + y = 4
\n" ); document.write( "-1 + y = 4
\n" ); document.write( "y = 4 + 1
\n" ); document.write( "y = 5
\n" ); document.write( ".........
\n" ); document.write( "x = 1 , y = 5
\n" ); document.write( "Hope this helps :-) \n" ); document.write( "
\n" );