2/3+3k/4=7/21

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Solution for 2/3+3k/4=7/21 equation: 


k in (-oo:+oo)

(3*k)/4+2/3 = 7/21 // - 7/21

(3*k)/4+2/3-(7/21) = 0

(3*k)/4+2/3-1/3 = 0

3/4*k+1/3 = 0 // - 1/3

3/4*k = -1/3 // : 3/4

k = -1/3/3/4

k = -4/9

k = -4/9

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