Multiplying fractions by whole numbers
1 answer:
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The per hour rate of first mechanic is $95 and per hour rate of $75.
Step-by-step explanation:
Let,
First mechanic's rate = x
Second mechanic's rate = y
10 hours charges of first mechanic = 10x
5 hour charges of second mechanic = 5y
According to given statement;
10x+5y=1325 Eqn 1
x+y=170 Eqn 2
Multiplying Eqn 2 by 10
Subtracting Eqn 2 from Eqn 3
Dividing both sides by 5
Putting y=75 in Eqn 2
The per hour rate of first mechanic is $95 and per hour rate of $75.
Keywords: linear equation, elimination method
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