Y=x-5 the subject of the formula below is y rearrange the formula to make x the subject

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

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?

Ineed someone to me answer my question i have to have this done and knocked out