Saada worked two part time jobs last week

Question

Saada worked two part time jobs last week. the first job paid $13 an hour, and the second job paid $12 an hour. she worked a total of 18 hours last week and earned $222. how many hours did saada work at the first job

Answer 1

Let X be the number of hours worked at the first job. The hours worked at the second job would be 18 - X.

The money made at the first job would 13X, and the money made at the second job would be 12(18-X). the sum of these two quantities must equal $222.

The equation is 13X + 12(18-X) = 222.

13X + 12x18 -12X = 222

X = 222 - 12x18 = 6 hours