Answer:
x=3
Step-by-step explanation:
When triangles are congruent, their sides are the same length.
In this equation, that means that 13 = 4x + 1, and 2x + y = 8x - 2y
Because we do not need to solve for "y", we only need to focus on the first problem.
13 = 4x +1
Subtract 1 from both sides.
4x = 12
x = 3
Hope this helps!
