x-20=(20+x)/3

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Solution for x-20=(20+x)/3 equation: 


x in (-oo:+oo)

x-20 = (x+20)/3 // - (x+20)/3

x-((x+20)/3)-20 = 0

(-1*(x+20))/3+x-20 = 0

(-1*(x+20))/3+(3*x)/3+(-20*3)/3 = 0

3*x-1*(x+20)-20*3 = 0

2*x-60-20 = 0

2*x-80 = 0

(2*x-80)/3 = 0

(2*x-80)/3 = 0 // * 3

2*x-80 = 0

2*x-80 = 0 // + 80

2*x = 80 // : 2

x = 80/2

x = 40

x = 40

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