Final answer:
In the first equation, x + 7 = 15, the value of x is 8. In the second equation, x - 5 = 22, the value of x is 27. In the third equation, 2x + 7 = 37, the value of x is 15.
Step-by-step explanation:
- For the equation x + 7 = 15, we need to isolate the variable x. Substracting 7 from both sides, we get x = 8.
- For the equation x - 5 = 22, we need to isolate the variable x. Adding 5 to both sides, we get x = 27.
- For the equation 2x + 7 = 37, we need to isolate the variable x. Subtracting 7 from both sides and then dividing by 2, we get x = 15.