Choose the correct translation of the following into symbolic algebra:

“Triple the total number of blue, green, and red marbles in the bag is 40 marbles less than the number of green marbles in the bag. ”

Where
r = the number of red marbles in the bag
b = the number of blue marbles in the bag
g = the number of green marbles in the bag

3(b + g + r) = 40 – g

3(b + g + r) = g + 40

3(b × g × r) = g + 40

3(b × g × r) = g + 40

3(b + g + r) = g – 40

b + g + r = g – 40

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?