document.write( "Question 379118: What is the answer to this word problem with work shown?
\n" ); document.write( "To pass a course, a student must have an average on four exams of at least 70. If a student scores 40, 78, and 88 on the first three tests, what must he earn on the fourth exam to pass the course?
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Algebra.Com's Answer #269244 by ankor@dixie-net.com(22740)\"\" \"About 
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To pass a course, a student must have an average on four exams of at least 70.
\n" ); document.write( " If a student scores 40, 78, and 88 on the first three tests,
\n" ); document.write( " what must he earn on the fourth exam to pass the course?
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\n" ); document.write( "Let x = required grade to average at least 70
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\n" ); document.write( "\"%28x+%2B+40+%2B+78+%2B+88%29%2F4\" => 70
\n" ); document.write( "Multiply both sides by 4, add up the given values
\n" ); document.write( "x + 206 => 280
\n" ); document.write( "x => 280 - 206
\n" ); document.write( "x => 74 to pass the course
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