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RSB [31]
3 years ago
10

A bag contains white marbles and red marbles, 16 in total. The number of white

Mathematics
1 answer:
Sonbull [250]3 years ago
4 0

Answer:

11

Step-by-step explanation:

Let's call the white marbles w and the red marbles r. We can write:

w + r = 16 (1)

w = 3r - 4 (2)

3r - 4 + r = 16 (3) (Substitute (2) into (1))

4r = 20 (simplify)

r = 5 (divide by 4) which means w = 16 - 5 = 11

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