Answer: C
Step-by-step explanation:
Looking at the triangle, we see that the angles are the same. This tells us the triangle is an isosceles triangle. That means the two adjacent sides are equal to each other.
4x+23=10x-1 [subtract both sides by 4x]
23=6x-1 [add both sides by 1]
24=6x [divide both sides by 6]
x=4
Now, we know that x=4.
