document.write( "Question 145181This question is from textbook Beginning Algebra
\n" ); document.write( ": Help me please...\r
\n" ); document.write( "\n" ); document.write( "I have to find the solution to the system of equations by the substitution method. Check answers..and place the solution in the form (x,y), (a,b), (p,q), or (s,t).\r
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\n" ); document.write( "\n" ); document.write( "4x+2y=4
\n" ); document.write( "3x+y=4 \n" ); document.write( "
Algebra.Com's Answer #105857 by nerdybill(7384)\"\" \"About 
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4x+2y=4 <<--equation 1
\n" ); document.write( "3x+y=4 <<--equation 2
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\n" ); document.write( "Let's start by solving equation 2 for y:
\n" ); document.write( "3x+y=4
\n" ); document.write( "y=4-3x
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\n" ); document.write( "Now, using equation 1, substitute y for the value above:
\n" ); document.write( "4x+2y=4
\n" ); document.write( "4x+2(4-3x)=4
\n" ); document.write( "4x+8-6x=4
\n" ); document.write( "8-2x=4
\n" ); document.write( "-2x=-4
\n" ); document.write( "x=2
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\n" ); document.write( "To find y, substitute x for 2 into either equation -- I'll pick equation 2:
\n" ); document.write( "3x+y=4
\n" ); document.write( "3(2)+y=4
\n" ); document.write( "6+y=4
\n" ); document.write( "y=-2
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\n" ); document.write( "(x,y)=(2,-2)
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