Question

Х+28=28 Х+7=7 Х-0=14 Х-х=0

Answer 1

1. Х=0
2. Х=0
3.Х=14
Х=любое число например 5: 5-5=0

Answer 2

Let's solve each equation step by step:

1. Х + 28 = 28 Subtract 28 from both sides to isolate Х: Х + 28 - 28 = 28 - 28 Х = 0

2. Х + 7 = 7 Subtract 7 from both sides to isolate Х: Х + 7 - 7 = 7 - 7 Х = 0

3. Х - 0 = 14 Any number subtracted by 0 remains the same: Х = 14

4. Х - х = 0 Here, we have an equation involving two different instances of the variable "х". We need to combine like terms to solve it. Subtract "х" from both sides: Х - х - х = 0 - х -х = -х

The equation -х = -х is an identity. It means that any value of "х" would satisfy this equation, making it true for all "х". In other words, the solution is infinite; "х" can be any real number.

So, to summarize:

1. Х = 0
2. Х = 0
3. Х = 14
4. Х can be any real number.