В трех коробках 135 карандашей причем во второй их три раза больше чем в 1 of 3 в 2 раза меньше чем в первой Сколько карандашей лежит в 3 коробки

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вопрос

Let x be the number of pencils in the first box.
Since the second box has three times as many pencils as the first box, it has 3x pencils.
And since the third box has half as many pencils as the first box, it has 0.5x pencils.

So we have the equation:
x + 3x + 0.5x = 135
4.5x = 135
x = 30

Therefore, there are:

In total, there are 30 + 90 + 15 = 135 pencils in the three boxes.