Write a system of equations to solve.

Question

Efrem worked 40 hours at his two jobs last week. He earned $20 per hour at his weekday job and $18 per hour at his weekend. He earned $770 in all. How many hours did he work at each job?

Answer 1

40 = t1 + t2, where t1 is the time spent at his weekday job and t2 is the time spent at his weekend job.

$770 = 20xt1 + 18xt2

You can solve this by substitution. If you need to see that, post a comment.