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PLEASE HELP ME!!!
How many blue pens were there to start with?

PLEASE HELP ME!!! How many blue pens were there to start with?-example-1

1 Answer

3 votes

Answer:

180 blue 70 red

Explanation:

b= blue r = red

b+r = 250

r = (250-b)

If 40% is removed the rest is 60%

If the 70% is removed the rest is 30%

0.6b + 0.3(250-b) = 129

0.6b + 75 - 0.3b = 129

0.3b = 54

divide by 0.3

b = 180

250-180 = 70

60% 0f 180 = 108

30% of 70 = 21

108 +21 = 129

User Talha Ashfaque
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