Question

the flipped video instruction for the \try this\ problem(s) below.
sing properties of parallel lines

1. find the value of x.

(6y - 3)°
129°

Explanation:

Step1: Identify supplementary angles

The angle $(6y-3)^\circ$ and $129^\circ$ are same-side interior angles, so they are supplementary (sum to $180^\circ$).
$$(6y - 3) + 129 = 180$$

Step2: Simplify the equation

Combine constant terms on the left.
$$6y + 126 = 180$$

Step3: Isolate the variable term

Subtract 126 from both sides.
$$6y = 180 - 126$$
$$6y = 54$$

Step4: Solve for y

Divide both sides by 6.
$$y = \frac{54}{6}$$

Answer:

$y = 9$