A stall's three-day sales record reads — Pens: Mon 25, Tue 30, Wed 35. Notebooks: Mon 18, Tue 22, Wed 20. Erasers: Mon 12, Tue 15, Wed x. The three-day total of all the items is 190. Find x.

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Accepted Answer

13. Pens total 25 + 30 + 35 = 90 and notebooks total 18 + 22 + 20 = 60, while the erasers give 12 + 15 + x = 27 + x. So 90 + 60 + 27 + x = 190, that is 177 + x = 190, giving x = 13.

A stall's three-day sales record reads — Pens: Mon 25, Tue 30, Wed 35. Notebooks: Mon 18, Tue 22, Wed 20. Erasers: Mon 12, Tue 15, Wed $x$ . The three-day total of all the items is 190. Find $x$ .

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