7-4k=-21

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Solution for 7-4k=-21 equation: 


k in (-oo:+oo)

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

7-(4*k)+21 = 0

7-4*k+21 = 0

28-4*k = 0 // - 28

-4*k = -28 // : -4

k = -28/(-4)

k = 7

k = 7

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