Question

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what is the value of x?
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$x = \square$
$2(x + 10)^\circ$
$(3x - 30)^\circ$

Explanation:

Step1: Set angles equal (vertical angles)

$2(x + 10) = 3x - 30$

Step2: Expand left side

$2x + 20 = 3x - 30$

Step3: Isolate x terms

$20 + 30 = 3x - 2x$

Step4: Calculate final value

$50 = x$

Answer:

$x = 50$