СРОООЧНО помогите пожалуйста с контрольной
#2

[tex]1)\frac{5}{6}x=30[/tex]

[tex]2)1\frac{7}{8} *x=40[/tex]

[tex]3)\frac{13}{21}-(x-2\frac{5}{7} )=\frac{3}{14}[/tex]
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