The correct option is D Sum of all angles of triangle = 180^∘ 30^∘ + 45^∘ + x = 180^∘ 75^∘ + x = 180^∘ x = 180^∘ 75^∘ = 105^∘ ...

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Solving an Equation with Variables on One Side

Find the valu...

Question

Find the value of x.

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Solution

The correct option is D

Sum of all angles of triangle = $180^{\circ}$
$30^{\circ}$ + $45^{\circ}$ + x = $180^{\circ}$
$75^{\circ}$ + x = $180^{\circ}$
x = $180^{\circ}$ - $75^{\circ}$ = $105^{\circ}$

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