Unghiurile AOB si COB sunt adiacente , m(∢AOB)=35 ,m(∢AOC)=71. Sa se afle masura unghiului format de bisectoarele celor doua unghiuri adiacente

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

The sum of two numbers is 86, and their difference is 20. find the two numbers

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?