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m in (-oo:+oo)
(1/3)*(8-m)+(5/3)*(2*m-4) = 14 // - 14
(1/3)*(8-m)+(5/3)*(2*m-4)-14 = 0
1/3*(8-m)+5/3*(2*m-4)-14 = 0
1/3*(8-m)+5/3*(2*m-4)-14 = 0
3*m-14-4 = 0
3*m-18 = 0
3*m-18 = 0
3*m-18 = 0 // + 18
3*m = 18 // : 3
m = 18/3
m = 6
m = 6
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