3/14х -0,59 = 8/21х - 1,24

[tex] \frac{3}{14} x-0,59= \frac{8}{21}x-1,24 \\ \frac{8}{21}x- \frac{3}{14} x=1,24-0,59 \\ \frac{16-9}{42} x=0,65 \\ \frac{1}{6} x=0,65 \\ x=0,65*6 \\ x=3,9 \\ \\ \frac{3}{14} x-0,59= \frac{8}{21}x-1,24 /*42 \\ 9x-24,78=16x-52,08 \\ 16x-9x=52,08-24,78 \\ 7x=27,3 \\ x=27,3:7 \\ x=3,9[/tex]