To solve these equations, we will simplify each equation step by step and solve for the variable x.

1) 70 - (x - 3) = 45
Distributing the negative sign: 70 - x + 3 = 45
Combining like terms: 73 - x = 45
Subtracting 73 from both sides: -x = -28
Multiplying both sides by -1: x = 28

2) 130 - (100 + x) = 25
Distributing the negative sign: 130 - 100 - x = 25
Combining like terms: 30 - x = 25
Subtracting 30 from both sides: -x = -5
Multiplying both sides by -1: x = 5

3) (x + 12) + 22 = 92
Removing the parentheses: x + 12 + 22 = 92
Combining like terms: x + 34 = 92
Subtracting 34 from both sides: x = 58

4) 12 + (5 + x) = 20
Removing the parentheses: 12 + 5 + x = 20
Combining like terms: 17 + x = 20
Subtracting 17 from both sides: x = 3

5) 175 + (30 - x) = 200
Removing the parentheses: 175 + 30 - x = 200
Combining like terms: 205 - x = 200
Subtracting 205 from both sides: -x = -5
Multiplying both sides by -1: x = 5

6) 95 - (x + 2) = 45
Distributing the negative sign: 95 - x - 2 = 45
Combining like terms: 93 - x = 45
Subtracting 93 from both sides: -x = -48
Multiplying both sides by -1: x = 48

So the solutions for the equations are:
1) x = 28
2) x = 5
3) x = 58
4) x = 3
5) x = 5
6) x = 48