document.write( "Question 601434: Hi can you please help me figure this problem. I am solving for x and y. the equation is {(3x+4y=48,x-y=2) this is how the teacher wrote it out on my assignment. The answers given were x=40 and y=42 I need to understand how these numbers were gotten and the book is no help. I am visual and there are no examples close to this problem. \n" ); document.write( "

Algebra.Com's Answer #379759 by Alan3354(69443) $\"\"$ $\"About$

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the equation is {(3x+4y=48,x-y=2) this is how the teacher wrote it out on my assignment. The answers given were x=40 and y=42 I need to understand how these numbers were gotten and the book is no help. I am visual and there are no examples close to this problem.
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\n" ); document.write( "Firstly, that's not an equation. It's 2 equations, called a system of equations.
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\n" ); document.write( "2nd, 40 & 42 are not the answers.
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\n" ); document.write( "3x+4y=48
\n" ); document.write( "x-y=2 --> x = y+2
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\n" ); document.write( "Sub for x in the 1st eqn
\n" ); document.write( "3(y+2) + 4y = 48
\n" ); document.write( "6y+6 + 4y = 48
\n" ); document.write( "7y = 42
\n" ); document.write( "y = 6
\n" ); document.write( "------
\n" ); document.write( "x = y+2
\n" ); document.write( "x = 8
\n" ); document.write( " \n" ); document.write( "

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