Final answer:
The value of x that makes the equation 2x + 3 = x - 4 true is -7. This is found by subtracting x and 3 from both sides of the equation.
Step-by-step explanation:
The equation given is 2x + 3 = x - 4. To find the value of x that makes this equation true, we will need to solve for x.
Step 1: Subtract x from both sides of the equation to get x isolated on one side:
2x + 3 - x = x - 4 - x
x + 3 = -4
Step 2: Subtract 3 from both sides of the equation to solve for x:
x + 3 - 3 = -4 - 3
x = -7
Therefore, the value of x that makes the equation true is -7.