document.write( "Question 152959: Office Expense. The monthly phone expense for an office is $1094 less than the janitorial expense. Three times the janitorial expense minus four times the phone expense is $248. What is the total of the two expenses?
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Algebra.Com's Answer #112586 by orca(409)\"\" \"About 
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Let x and y be the phone expense and janitorial expense respectively.
\n" ); document.write( "As the phone expense for an office is $1094 less than the janitorial expense, we have:
\n" ); document.write( "y - x = 1094 ...........(1)
\n" ); document.write( "As three times the janitorial expense minus four times the phone expense is $248, we have
\n" ); document.write( "3y - 4x = 248 ..........(2)
\n" ); document.write( "From equation(1), we get y = x + 1094.
\n" ); document.write( "Substituting it into equation (2), we have
\n" ); document.write( "3(x + 1094) - 4x = 248
\n" ); document.write( "Solving for x, we obtain:
\n" ); document.write( "3x + 3282 - 4x = 248
\n" ); document.write( "-x = -3034
\n" ); document.write( "x = 3034
\n" ); document.write( "Substituting x = 3034 into y = x + 1094, we obtain
\n" ); document.write( "y = x + 1094 = 4138
\n" ); document.write( "So the total of the two expenses is x + y = 3034 + 4138 = $7172.\r
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