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(1/7)*x-(2/3) = -4/3 // + -4/3
(1/7)*x-(2/3)-(-4/3) = 0
(1/7)*x-2/3+4/3 = 0
1/7*x+2/3 = 0 // - 2/3
1/7*x = -2/3 // : 1/7
x = -2/3/1/7
x = -14/3
x = -14/3
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