I need help with this math problem, I'm doing Delta Math on it. Which expression equivalent to c-5c-2c? 1-7c -6c
c-7 or -2c
combine like terms. I need help.

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3