Question

find the value of x.
$x = \square$

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is $180^\circ$.

Step2: Set up the equation

$43 + 80 + x = 180$

Step3: Calculate sum of known angles

$43 + 80 = 123$

Step4: Solve for $x$

$x = 180 - 123$

Answer:

$57$