Question

e each side of the equation by 2 to find the value of a, or the measure of the unknown angles. 2a + 100 = 180 - 100 - 100 2a = 80 2 2 = 40 the value of a is 40.

Explanation:

Step1: Subtract 100 from both sides

$$2a + 100-100=180 - 100$$
$$2a=80$$

Step2: Divide both sides by 2

$$\frac{2a}{2}=\frac{80}{2}$$
$$a = 40$$

Answer:

The value of \(a\) is \(40\).