(78+76+x)/3=70

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Solution for (78+76+x)/3=70 equation: 


x in (-oo:+oo)

(x+76+78)/3 = 70 // - 70

(x+76+78)/3-70 = 0

(x+154)/3-70 = 0

(x+154)/3+(-70*3)/3 = 0

x-70*3+154 = 0

x-56 = 0

(x-56)/3 = 0

(x-56)/3 = 0 // * 3

x-56 = 0

x-56 = 0 // + 56

x = 56

x = 56

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