the total cost C​ (in dollars) to participate in a ski club is given by the literal equation C=85x+60= , where x​ is the number of ski trips you take

Question

The total cost  C​ (in dollars) to participate in a ski club is given by the literal equation C=85x+60= , where x​ is the number of ski trips you take.

a. Solve the equation for  x​

b. How many ski trips do you take if you spend a total of $315? $485?

Answer 1

a. simply rearrange the equation:

C=85X+60 --> C-60=85X --> X=(C-60)/85

b.

If C=$315 then X= (315 - 60)/85 = 3 trips

and If C=$485 then X= (485 - 60)/85 = 5 trips