document.write( "Question 960296: Solve the following systems of equations:
\n" ); document.write( "x+y=-1,
\n" ); document.write( "3x=4-3y \n" ); document.write( "

Algebra.Com's Answer #590061 by EdenWolf(517) $\"\"$ $\"About$

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Solved by pluggable solver: SOLVE linear system by SUBSTITUTION

Solve:
\n" ); document.write( " $\"+system%28+%0D%0A++++1%5Cx+%2B+1%5Cy+=+-1%2C%0D%0A++++3%5Cx+%2B+3%5Cy+=+4+%29%0D%0A++\"$ We'll use substitution. After moving 1*y to the right, we get:
\n" ); document.write( " $\"1%2Ax+=+-1+-+1%2Ay\"$ , or $\"x+=+-1%2F1+-+1%2Ay%2F1\"$ . Substitute that
\n" ); document.write( " into another equation:
\n" ); document.write( " $\"3%2A%28-1%2F1+-+1%2Ay%2F1%29+%2B+3%5Cy+=+4\"$ and simplify: So, we know that y=-7=0. Since $\"x+=+-1%2F1+-+1%2Ay%2F1\"$ , x=6.
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\n" ); document.write( " Answer: $\"system%28+x=6%2C+y=-7=0+%29\"$ .
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\n" ); document.write( "\n" ); document.write( "Ignore where it says -7=0, ignore the 0 part. \n" ); document.write( "

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