Question

The cost (d) in dollars of making (w) watches is represented by d=25w+35. How many watches are made when the cost is 260$?

Answer 1

with this equation, substituting D for the cost, you have
260=25w+35
now subtract 35 from both sides

225=25w
divide by 25 on both sides
you get 9=w

so 9 watches

Answer 2

9 watches wuld have to be made