Question

which equation can you use to find the value of x?
$x = 120 + 35$
$x = 120 - 35$
$x + 120 + 35 = 180$
$x + 120 - 35 = 180$
(there is a triangle - like figure with angles 35°, 120°, and x°)

Explanation:

Step1: Recall Triangle Angle Sum

The sum of interior angles in a triangle is \(180^\circ\). So, the three angles (\(x^\circ\), \(120^\circ\), \(35^\circ\)) must add up to \(180^\circ\).

Step2: Formulate the Equation

Using the angle - sum property, we get the equation \(x + 120+35 = 180\).

Answer:

\(x + 120 + 35 = 180\)