Question

A photograph studio charges a sitting fee of $50 and $10 per enlargement ordered write an equation to represent the number of enlargements ordered and is the total cost was $180

Answer 1

c is total cost, e is the number of enlargements.
c=10e + 50

Plug in the total cost to find the number of enlargements

180=10e +50

Subtract 50 from both sides

130=10e

Divide each side by 10 and you are left with
13=e

The number of enlargements for $180 is 13.
Hope I helped!