Find the measure of an angle which is 70 degree less than 3times it's complementary angle

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Solution

let the angle be x
then complementary angle be 90-x

so as per question,

x= 3(90-x)-70
so x=270-3x-70
x+3x =200
4x=200
x= 200/ 4=50

so answer is 50 degree

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