What divided by 1.2 = 3?

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48