1)7 - 1 / 2 - 21/3 = х + 3 /5 5( х - 1 ) / 6 = 3 ( х - 5 ) / 7 - 2

1) 13/2 - 21/3=х+3/5
-1/2=х+3/5
-х=3/5+1/2
-х=11/10
х=-11/10

$2) \frac{5(x-1)}{6} = \frac{3(x-5)}{7} -2 \\ \\ \frac{5(x-1)}{6} = \frac{3(x-5)-14}{7} \\ \\ \frac{5x-5}{6}= \frac{3x-15-14}{7} \\ \\ \frac{5x-5}{6}= \frac{3x-29}{7} \\ \\ 7(5x-5)=6(3x-29) \\ \\ 35x-35=18x-174 \\ \\ 35x-18x=-174+35 \\ \\ 17x=-139 \\ \\ x=-8 \frac{3}{17}$