1.

Three angles of triangle are given (x-40°),(x-20°)(1/2x-20°).find the value of x​

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ANSWER:

sum of these 3 is 180 degrees so x-40+x-20+1/2x-20=180

2x + 1/2x = 260

so 4x^2+1/(2x)= 260

so 4x^2-260x+1= 0

so answer is 65(64.99) and pls MARK brainliest

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