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melamori03 [73]
3 years ago
9

Twelve marbles are in a

Social Studies
1 answer:
Alja [10]3 years ago
5 0

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

<em>Combine like terms</em>

r + b + 6 = 12

<em>Subtract 6</em>

r + b = 6

<em>Because r = b, plug in b for r</em>

b + b = 6

2b = 6

b = 3

Which makes r = 3

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