Question

Two plumbers make house calls. One charges $105 for a visit plus $30 per hour

of work. The other charges $65 per visit plus $40 per hour of work. For how
many hours of work do the two plumbers charge the same?

Answer 1

Explanation:

plumber ones equation: y = 30x + 105

plumber two: y = 40x + 65

set the two equations equal to each other

30x + 105 = 40x + 65

solve for x

40 = 10x

4 = x

after 4 hours they will charge the same