SOLUTION: Sarah worked 16 hours babysitting last week. She earned $5 per hour working for the smiths, and she earned $5.50 per hour working for the Jones. If she earned a total of $82 how ma

Algebra ->  Expressions-with-variables -> SOLUTION: Sarah worked 16 hours babysitting last week. She earned $5 per hour working for the smiths, and she earned $5.50 per hour working for the Jones. If she earned a total of $82 how ma      Log On


   



Question 987292: Sarah worked 16 hours babysitting last week. She earned $5 per hour working for the smiths, and she earned $5.50 per hour working for the Jones. If she earned a total of $82 how many hours did she work for the Jones?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +n+ = number of hrs she worked for Jones
+16+-+x+ = number of hrs she worked for Smiths
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+5%2A%28+16+-+n+%29+%2B+5.5n+=+82+
+80+-+5n+%2B+5.5n+=+82+
+.5n+=+2+
+n+=+4+
She worked 4 hrs for the Jones
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check:
+5%2A%28+16+-+n+%29+%2B+5.5n+=+82+
+5%2A%28+16+-+4+%29+%2B+5.5%2A4+=+82+
+5%2A12+%2B+22+=+82+
+60+%2B+22+=+82+
+82+=+82+
OK