7(9+3k)=210

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Solution for 7(9+3k)=210 equation: 


k in (-oo:+oo)

7*(3*k+9) = 210 // - 210

7*(3*k+9)-210 = 0

7*(3*k+9)-210 = 0

21*k-147 = 0

21*k-147 = 0

21*k-147 = 0 // + 147

21*k = 147 // : 21

k = 147/21

k = 7

k = 7

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