document.write( "Question 59460This question is from textbook Algebra and Trigonometry
\n" ); document.write( ": 2. x+3y=-9 Question: Add -9 to both sides of Equation. Do this by adding -9 to the right side, and x+3y (Which equals -9) to the left side. The resulting equation should have only x as the variable. The y should have been eliminated. \n" ); document.write( "
Algebra.Com's Answer #40893 by pvaka(23)\"\" \"About 
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Use the substitution methods to solve for y and then subtiture the result in the original equation.
\n" ); document.write( "Step1. Solve for y
\n" ); document.write( "x+3y=-9
\n" ); document.write( "x+3y-x=-9-x
\n" ); document.write( "3y/3=-x/3-9/3
\n" ); document.write( "y=-1/3x-3
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\n" ); document.write( "Step2.===>now subtitute (-1/3x-3) for y in x + 3y = -9
\n" ); document.write( "x +3(-1/3x-3) =-9
\n" ); document.write( "x -3(x+9/3) =-9
\n" ); document.write( "x - x-9 = -9
\n" ); document.write( "-9 = -9
\n" ); document.write( "x= any real numbers (infinite number of solution)\r
\n" ); document.write( "\n" ); document.write( "Pvaka\r
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