Question

solve for x

Explanation:

Step1: Use the exterior angle theorem

The exterior angle theorem states that an exterior angle of a triangle is equal to the sum of the two non - adjacent interior angles. So, \((5x + 5)^{\circ}=(2x + 1)^{\circ}+90^{\circ}\).

Step2: Solve the equation

$$
LATEXBLOCK0
$$

Answer:

\(12\)