solve the equation - (7x-1)/4 - -1/3 (2x-1-
x/2)=-19/3
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-(7x-1)/4+1/3×(2x-1-x/2)
-7x+1/13/3×(4x-2-x)/(2)
3×(-7x+1)/13×(3x-2)/2
(-21x+3)/13×(3x-2)/2
(-21x+3)(3x-2)/13×2
(-63x^2+9x+42x-6)/26
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