Question

1. find x if m is a midpoint. a 3x - 1 m x + 7 b

Explanation:

Step1: Set up equation

Since M is the mid - point, AM = MB. So, 3x - 1=x + 7.

Step2: Isolate x terms

Subtract x from both sides: 3x−x−1=x−x + 7, which simplifies to 2x−1 = 7.

Step3: Isolate the variable

Add 1 to both sides: 2x−1 + 1=7 + 1, getting 2x = 8.

Step4: Solve for x

Divide both sides by 2: $\frac{2x}{2}=\frac{8}{2}$, so x = 4.

Answer:

4