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-(4*((2/3)*x+6))-7*x = 28 // - 28
-(4*((2/3)*x+6))-7*x-28 = 0
-4*((2/3)*x+6)-7*x-28 = 0
-4*(2/3*x+6)-7*x-28 = 0
-4*(2/3*x+6)-7*x-28 = 0
-29/3*x-28-24 = 0
-29/3*x-52 = 0
-29/3*x-52 = 0
-29/3*x-52 = 0 // + 52
-29/3*x = 52 // : -29/3
x = 52/(-29/3)
x = -156/29
x = -156/29
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