Answer and explanation:
To solve this, you must find what x equals
x + 2x + 7 = 3x - 7 Add together any numbers that can be added on their side
3x + 7 = 3x - 7 Then subtract 7 from both sides to get 3x alone
3x = 3x - 14 Then subtract 3x from both sides to get x
*The x's cancel each other out so you must have typed the equation wrong. Please check to see any mistakes you may have made*