(2b-3)/3=21-b

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


b in (-oo:+oo)

(2*b-3)/3 = 21-b // - 21-b

(2*b-3)/3+b-21 = 0

(2*b-3)/3+(3*b)/3+(-21*3)/3 = 0

2*b+3*b-21*3-3 = 0

5*b-63-3 = 0

5*b-66 = 0

(5*b-66)/3 = 0

(5*b-66)/3 = 0 // * 3

5*b-66 = 0

5*b-66 = 0 // + 66

5*b = 66 // : 5

b = 66/5

b = 66/5

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