Method of Substitution to Find the Solution of a Pair of Linear Equations
Find the valu...
Question
Find the value of x.
A
25∘
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B
22∘
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C
20∘
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D
21∘
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Solution
The correct option is C20∘ 2x+10+2x+90∘=180∘ (Sum of all the angles of a triangle is 180∘) 2x+10+2x=90 4x=90−10 4x=80 x=20∘
So, option D is the correct answer.