Question

Ella is selling cookies for $4 per dozen. She
pays $10 for ingredients. If she ends up with
a profit of $66 how many dozen cookies
did she sell?
Equation
Solution

Answer 1

Equation: 4x-10=66

Move -10 to the other side by adding 10 to both sides. to get 4x=76.

Multiply both sides by 4 and get x=19, so she sold 19 cookies