Question11Б ангийн хөвгүүд нь охидоос 2-оор олон ба хөвгүүд тус бүр 3, охид тус бүр 2 мод цэцэрлэгт хүрээлэнд тарьжээ. Хөвгүүдийн тоог $x$ гэвэл бүх охид нийт хичнээн мод тарьсан бэ?

Studdy Solution

STEP 1

1. The number of boys in class 11Б is 2 more than the number of girls.
2. Each boy plants 3 trees.
3. Each girl plants 2 trees.
4. We need to find the total number of trees planted by all the girls.
5. Let $x$ be the number of boys.

STEP 2

1. Express the number of girls in terms of $x$ .
2. Calculate the total number of trees planted by the girls.

STEP 3

Express the number of girls in terms of $x$ .
Since the number of boys is 2 more than the number of girls, we can write: $\text{Number of girls} = x - 2$

STEP 4

Calculate the total number of trees planted by the girls.
Each girl plants 2 trees, so the total number of trees planted by all the girls is: $2 \times (\text{Number of girls}) = 2 \times (x - 2)$
Simplify the expression: $2(x - 2) = 2x - 4$
Therefore, the total number of trees planted by all the girls is: $\boxed{2x - 4}$

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