Question

Twelve marbles are in a

Answer 1

Answer:

yellow = 4

green = 2

blue = 3

red = 3

Explanation:

y = yellow marbles

r = red marbles

b = blue marbles

g = green marbles

y + r + b + g = 12

y = 1/3 (12) = 4

r = b

g = y - 2 = 4 - 2 = 2

That means...

4 + r + b + 2 = 12

Combine like terms

r + b + 6 = 12

Subtract 6

r + b = 6

Because r = b, plug in b for r

b + b = 6

2b = 6

b = 3

Which makes r = 3