SOLUTION: Hello There, I'm stuck on this problem on my online algebra homework and can never see to get the answer right, so if anyone who can solve this problem with a valid answer, it wo

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Question 845262: Hello There,
I'm stuck on this problem on my online algebra homework and can never see to get the answer right, so if anyone who can solve this problem with a valid answer, it would be great!
Problem:
Marcus and Tony work for the same company. Marcus lays a slap of concrete in 4 hours. Tony lays the same size slab in 7 hours. If both work on the job and the cost is $77.00 per hour, decide what the labor estimate should be!
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1/4+1/7=1/x
7/28+4/28=1/x
11/28=1/x
x=28/11
28/11*77=196