2) A store sells two different packages of pencils as described below. • Package A: 16 pencils
• Package B: 10 pencils
Write an equation for Package A and an equation for Package B that represent the total
number of pencils, x, in y packages.
3
Package A
4
Package B

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?