Question

Решить уравнение. сделать проверку 11-х=7 и х-5=10

Answer 1

11-X=7
X=11-7
X=4
11-4=7
7=7

X-5=10
X=10+5
X=15
15-5=10
15=15

Answer 2

Уравнение 1: 11 - x = 7

To solve the equation 11 - x = 7, we need to isolate the variable x on one side of the equation. We can do this by subtracting 11 from both sides of the equation:

11 - x - 11 = 7 - 11

Simplifying the equation gives us:

-x = -4

To solve for x, we can multiply both sides of the equation by -1 to get rid of the negative sign:

-x * (-1) = -4 * (-1)

This simplifies to:

x = 4

Therefore, the solution to the equation 11 - x = 7 is x = 4.

Уравнение 2: x - 5 = 10

To solve the equation x - 5 = 10, we need to isolate the variable x on one side of the equation. We can do this by adding 5 to both sides of the equation:

x - 5 + 5 = 10 + 5

Simplifying the equation gives us:

x = 15

Therefore, the solution to the equation x - 5 = 10 is x = 15.

Проверка:

Let's substitute the values we found for x back into the original equations to verify if they are correct.

For the equation 11 - x = 7, when we substitute x = 4, we get:

11 - 4 = 7

This simplifies to:

7 = 7

The equation is true, so x = 4 is a valid solution.

For the equation x - 5 = 10, when we substitute x = 15, we get:

15 - 5 = 10

This simplifies to:

10 = 10

The equation is true, so x = 15 is a valid solution.

Therefore, the solutions x = 4 and x = 15 satisfy both equations.