Answer: I = 23.
Step-by-step explanation: To solve this equation for x, you can start by subtracting 7 from both sides to get -4x = 16. Then, you can divide both sides by -4 to get x = -4.
So, the value of x that makes the equation true is x = -4.
To find the value of I, you can substitute this value back into the original equation:
-4(-4) + 7 = 23
16 + 7 = 23
23 = 23
Thus, I = 23.