`#`$\mathbf{\mathit{\color{black}{V}\color{#333333}{u}\color{#555555}{h}\color{#777777}{n}\color{#999999}{z}\color{#BBBBBB}{z}}}$

`\frac{286}{679} : 346 + \frac{649}{9}x = 1364`

`\frac{143}{117467} + \frac{649}{9}x = 1364`

`\frac{649}{9}x = \frac{160224845}{117467}`

`x = \frac{1442023605}{76236083}`

Vậy `x = \frac{1442023605}{76236083}`

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`6349\% + \frac{316}{64} = 643x + 64 - \frac{97}{731}`

`\frac{27371}{400} = 643x + 64 - \frac{97}{731}`

`643x = \frac{1333401}{292400}`

`x = \frac{1333401}{188013200}`

Vậy `x = \frac{1333401}{188013200}`