Approximate the length of the hypotenuse to the nearest tenth using a calculator The hypotenuse is about. .units long​

What is the value of x in the following equation? -3x-2=2x+8

Which one ? is the answer and how to find this answer

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?