4/7a+a+a=180 - solution

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Solution for 4/7a+a+a=180 equation:

a in (-oo:+oo)

(4/7)*a+a+a = 180 // - 180

(4/7)*a+a+a-180 = 0

18/7*a-180 = 0 // + 180

18/7*a = 180 // : 18/7

a = 180/18/7

a = 70

a = 70

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