You have $50 in your bank account. you make eight dollars per hour mowing lawn's. how many hours must you mow lawns to have a total of $130 in your bank account?

First way of answering:

130- 50 = 80
80 ÷ 8 = 10

Second way of answering:
130 = 50 + 8×h                                h- hours
- 50   -50

80 = 8 × h
÷8   ÷8

10 = h

Must work for 10 hours to get a total of 130 in your bank account.