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7*((1/3)*x+7) = 148/3 // - 148/3
7*((1/3)*x+7)-(148/3) = 0
7*((1/3)*x+7)-148/3 = 0
7*(1/3*x+7)-148/3 = 0
(3*7*(1/3*x+7))/3-148/3 = 0
3*7*(1/3*x+7)-148 = 0
7*x-1 = 0
(7*x-1)/3 = 0
(7*x-1)/3 = 0 // * 3
7*x-1 = 0
7*x-1 = 0 // + 1
7*x = 1 // : 7
x = 1/7
x = 1/7
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