Two boys divided $3.36 so that one boy received 12 cents less than three times as much as the other. how was the money divided?

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?

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer