(21-2x)/3=5

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Solution for (21-2x)/3=5 equation: 


x in (-oo:+oo)

(21-(2*x))/3 = 5 // - 5

(21-(2*x))/3-5 = 0

(21-2*x)/3-5 = 0

(21-2*x)/3+(-5*3)/3 = 0

21-2*x-5*3 = 0

6-2*x = 0

(6-2*x)/3 = 0

(6-2*x)/3 = 0 // * 3

6-2*x = 0

6-2*x = 0 // - 6

-2*x = -6 // : -2

x = -6/(-2)

x = 3

x = 3

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