document.write( "Question 260348: Three times the first number plus the second number is 88. The first number times 10 is equal to 4 times the second.What is the unknown number? \n" ); document.write( "
Algebra.Com's Answer #191807 by ankor@dixie-net.com(22740)\"\" \"About 
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Let x = the 1st number
\n" ); document.write( "let y = the 2nd number
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "Three times the first number plus the second number is 88.
\n" ); document.write( "3x + y = 88
\n" ); document.write( "y = (88-3x); use for substitution
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\n" ); document.write( " The first number times 10 is equal to 4 times the second.
\n" ); document.write( "10x = 4y
\n" ); document.write( "Replace y with (88-3x)
\n" ); document.write( "10x = 4(88-3x)
\n" ); document.write( "10x = 352 - 12x
\n" ); document.write( "10x + 12x = 352
\n" ); document.write( "22x = 352
\n" ); document.write( "x = \"352%2F22\"
\n" ); document.write( "x = 16 is the unknown number
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\n" ); document.write( "Check solution:
\n" ); document.write( "y = 88 - 3(16)
\n" ); document.write( "y = 88 - 48
\n" ); document.write( "y = 40
\n" ); document.write( "\"The first number times 10 is equal to 4 times the second.\"
\n" ); document.write( "10(16) = 4(40)
\n" ); document.write( "160 = 160\r
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