I need to solve this equation 10x+8y=152.5?

the 10 and 8 are hours that L works at two part time jobs one job he work for 10 hours and the other for 8 earning 152.5 the week before that L work 8 hours at first job and 12 hours at second job earning 171 dollars i need to figure out how much he makes at his second job
Update: actually i figure that it needs to be done by linear combination
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