а-7=3

Вот подробное решение задачи a - 7 = 3 (уровень 7-й класс, стиль на английском):

• Step 1: Start with the equation a - 7 = 3

• Step 2: Undo the subtraction by adding 7 to both sides (a - 7) + 7 = 3 + 7

• Step 3: Simplify both sides a = 10

• Step 4: Check the answer If a = 10, then 10 - 7 = 3, which is correct.

• Explanation (почему так работает): Subtracting 7 from a lowers its value by 7. To undo this operation and solve for a, we add 7 to both sides of the equation. This uses the inverse relationship between subtraction and addition.

• Final answer: a = 10