Question

which equation can you use to find the value of ( x )?( x + 30 + 105 = 180 )find the value of ( x ).( x = )an error has occurred. please enter a number.

Explanation:

Step1: Sum known angles

$30 + 105 = 135$

Step2: Isolate $x$ via subtraction

$x = 180 - 135$

Answer:

$x = 45$