A plumber charges $50 for every house call and an additional $70 for each hour of work. For one house call yesterday, the plumber earned $435.
Which equation can be solved to find the number of hours the plumber worked on the house call?
• A. 435 = 70x + 50
O B. 135 = (50 + 70)х
◎ C.435= （x+70)+50
O D. 435 = 50x + 70
The correct equation that can be solved to find the number of hours the plumber worked on the house call is:
A. 435 = 70x + 50