document.write( "Question 209599: I'm having trouble on how to figure this out. I don't know how to set this up as an equation. the sum of three numbers is 137. The second number is 30 less than 4 times the first. The third number is 20 more than twice the first number. please help me figure out how to write this as an equation! thank you! \n" ); document.write( "
Algebra.Com's Answer #158471 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
three numbers, x, y, z
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "\" the sum of three numbers is 137.\"
\n" ); document.write( "x + y + z = 137
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\n" ); document.write( "\" The second number is 30 less than 4 times the first.\"
\n" ); document.write( "y = 4x - 30
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\n" ); document.write( "\" The third number is 20 more than twice the first number.
\n" ); document.write( "z = 2x + 20
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\n" ); document.write( "Using the 1st equation (sum) substitute: (4x-30) for y, and (2x+20) for z
\n" ); document.write( "x + (4x-30) + (2x+20) = 137
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\n" ); document.write( "7x - 10 = 137
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\n" ); document.write( "7x = 137 + 10
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\n" ); document.write( "7x = 147
\n" ); document.write( "x = \"147%2F7\"
\n" ); document.write( "x = 21
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\n" ); document.write( "You should be able to find y and z, check your solutions in the sum equation
\n" ); document.write( "If not, email me: ankor@att.net \n" ); document.write( "
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