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k in (-oo:+oo)
(3/4)*k-((2/3)*k)-28 = 37 // - 37
(3/4)*k-((2/3)*k)-37-28 = 0
(3/4)*k+(-2/3)*k-37-28 = 0
1/12*k-65 = 0 // + 65
1/12*k = 65 // : 1/12
k = 65/1/12
k = 780
k = 780
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