Question

Solve this for me and explain it to me. cause I'm confused.

Answer 1

28

Explanation:

If g is the number of green marbles, and b is the number of blue marbles, then:

g + b = 36

g = 4 + 3b

Solve the system of equations. Using substitution:

(4 + 3b) + b = 36

4 + 4b = 36

4b = 32

b = 8

Therefore:

g = 28