$$\frac{ 7x-1 }{ 4 } - \frac{ 1 }{ 3 } (2x- \frac{ 1-x }{ 2 } )= \frac{ 10 }{ 3 }$$
$x = \frac{41}{11} = 3\frac{8}{11} \approx 3.727272727$
$$3\left(7x-1\right)-4\left(2x-\frac{1-x}{2}\right)=40$$
$$21x-3-4\left(2x-\frac{1-x}{2}\right)=40$$
$$21x-3-4\left(2x-\left(\frac{1}{2}-\frac{1}{2}x\right)\right)=40$$
$$21x-3-4\left(2x-\frac{1}{2}-\left(-\frac{1}{2}x\right)\right)=40$$
$$21x-3-4\left(2x-\frac{1}{2}+\frac{1}{2}x\right)=40$$
$$21x-3-4\left(\frac{5}{2}x-\frac{1}{2}\right)=40$$
$$21x-3-4\times \frac{5}{2}x-4\left(-\frac{1}{2}\right)=40$$
$$21x-3+\frac{-4\times 5}{2}x-4\left(-\frac{1}{2}\right)=40$$
$$21x-3+\frac{-20}{2}x-4\left(-\frac{1}{2}\right)=40$$
$$21x-3-10x-4\left(-\frac{1}{2}\right)=40$$
$$21x-3-10x+\frac{-4\left(-1\right)}{2}=40$$
$$21x-3-10x+\frac{4}{2}=40$$
$$21x-3-10x+2=40$$
$$11x-3+2=40$$
$$11x-1=40$$
$$11x=40+1$$
$$11x=41$$
$$x=\frac{41}{11}$$
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