solve the number sentence

Algebra
Tutor: None Selected Time limit: 1 Day

two mechanics worked on a car for the total that they charged of $1625. The first mechanic worked for 5 hours. The second mechanic worked for 15 hours. what was the rate charged per hour if the sum of the two rates were $145. 

first m

second m

Jun 7th, 2015

Sum of rate charge per mechanic \[r_1 + r_2 = 145\]

Total rate charge \[5r_1 + 15r_2 = 1625\]

Jun 7th, 2015

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Jun 7th, 2015
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Jun 7th, 2015
Dec 4th, 2016
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