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sladkih [1.3K]
3 years ago
10

A plumber charges an initial amount,x, to make a house call plus an hourly rate,y, for the time he is working.A 1-hour job costs

$90 and a 3-hour job cost $210
Mathematics
1 answer:
Inessa05 [86]3 years ago
5 0
X=$30
y=$60

1 hour job- 60x1=60+30=90
3 hour job-60x3=180+30=210
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