Question 1062590
mechanic a makes x dollars per hour
mechanic b makes y dollars per hour.
10x+15y=2175
x+y=160; multiply this by -10 and add to the first to eliminate x
-10x-10y=-1600
5y=575
y=$115 @ 15 hours=$1725
x=$45 @ 10 hours=$450
They add to $2175.