sam labels two vertical angles in his frame as $x$ and $(2x - 30)^{circ…

$sam labels two vertical angles in his frame as $x$ and $(2x - 30)^{circ…$

sam labels two vertical angles in his frame as $x$ and $(2x - 30)^{circ}$. solve for $x$. $x=$

Vertical angles are equal. So, $x = 2x - 30$.

Subtract $2x$ from both sides: $x-2x=2x - 30-2x$, which gives $-x=-30$.
Multiply both sides by $- 1$: $x = 30$.

$x = 30$