Question

5 · (2 + а) - 7 = -а + 15

Answer 1

Ответ:

5*(2+a)-7= -a+15

5* 2+a-7= -a+15

10+5a-7= -a+15

3+5a= -a+15

5a+a=15-3

6a=12

a=2

Пошаговое объяснение:

1.Сначало росскрываем скобки

2.Вычесляем

3.Переносим слагаемое в другую часть уровнения

4.Перенести подобные члены Вычеслить

5.Разделить обе стороны

6.Ну и получается решение a=2

Answer 2

To solve the equation 5(2 + a) - 7 = -a + 15 for the variable "a," you'll need to follow these steps:

1. Distribute the 5 on the left side of the equation:

   5 * 2 + 5 * a - 7 = -a + 15

2. Simplify both sides of the equation by performing the multiplications:

   10 + 5a - 7 = -a + 15

3. Combine like terms on both sides:

   10 - 7 + 5a = -a + 15

   3 + 5a = -a + 15

4. To isolate "a" on one side of the equation, add "a" to both sides:

   3 + 5a + a = -a + a + 15

   3 + 6a = 15

5. Now, subtract 3 from both sides to solve for "a":

   3 + 6a - 3 = 15 - 3

   6a = 12

6. Finally, divide both sides by 6 to find the value of "a":

   6a/6 = 12/6

   a = 2

So, the solution to the equation is a = 2.