(x-21)/5=20

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Solution for (x-21)/5=20 equation: 


x in (-oo:+oo)

(x-21)/5 = 20 // - 20

(x-21)/5-20 = 0

(x-21)/5+(-20*5)/5 = 0

x-20*5-21 = 0

x-121 = 0

(x-121)/5 = 0

(x-121)/5 = 0 // * 5

x-121 = 0

x-121 = 0 // + 121

x = 121

x = 121

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