Question

What is the value of x?

Answer 1

`\tt x=10^o`

Explanation:

The given angles are supplementary angles, meaning they add up to 180°.

`\tt 100+ 9x - 10 = 180^o`

`\tt 90 + 9x = 180^o`

`\tt 90+9x-90=180-90\:\: (Subtract)`

`\tt 9x=90`

`\tt \cfrac{9x}{9}=\cfrac{90}{9}\;\;(Divide)`

`\tt x=10^o`

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Answer 2

x = 10

Explanation:

the two angles shown are supplementary, they add up to 180 degrees

so we can write this equation to solve for 'x':

100 + 9x - 10 = 180

90 + 9x = 180

9x = 90

x = 10