Question

Реши уравнения x-9=7 ,x+30=70 как правильно решить

Answer 1

Х-9=7. Х=9+7 . X =16

Answer 2

Х-9=7
х=7+9
х=16
проверка
16-9=7
7=7(в)
ответ:16
х+30=70
х=70-30
х=40
проверка
40+30=70
70=70(в)
ответ:40

Answer 3

Solving the Equations:

To solve the equations x - 9 = 7 and x + 30 = 70, we can follow these steps:

1. For the equation x - 9 = 7: - Add 9 to both sides of the equation to isolate x. - The result will give us the value of x.

2. For the equation x + 30 = 70: - Subtract 30 from both sides of the equation to isolate x. - The result will give us the value of x.

Let's solve these equations step by step.

Solving x - 9 = 7:

Adding 9 to both sides of the equation: ``` x - 9 + 9 = 7 + 9 x = 16 ``` So, the solution for the equation x - 9 = 7 is x = 16.

Solving x + 30 = 70:

Subtracting 30 from both sides of the equation: ``` x + 30 - 30 = 70 - 30 x = 40 ``` So, the solution for the equation x + 30 = 70 is x = 40.

Therefore, the solutions to the given equations are: - x = 16 for the equation x - 9 = 7 - x = 40 for the equation x + 30 = 70.