Gavin works two part-time jobs to pay for college. He works 8 hours each week tutoring and 10 hours each week in the dining hall. He gets paid the same hourly wage at each job. His parents also provide Gavin $50 per week for expenses. Gavin writes this expression, 18w+50, where w represents his hourly wage, to represent his total weekly income.

Write another expression, equivalent to Gavin’s, showing each part of his income separately.