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(1/7)*(x-14) = -5 // + 5
(1/7)*(x-14)+5 = 0
1/7*(x-14)+5 = 0
1/7*(x-14)+5 = 0
1/7*x+3 = 0
1/7*x+3 = 0
1/7*x+3 = 0 // - 3
1/7*x = -3 // : 1/7
x = -3/1/7
x = -21
x = -21
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