9-7(x+3)=5-4x

9-7x-21=5-4x

-7x+4x=5+21-9

-3x=17

x=-5 целых 2/3

9-7(х+3)=5-4х

9-7×х+7×3=9-7х-21

9-7х-21=5-4х

-7х+4х=5-9+21

-3х=17

х=17÷(-3)

х=-5 две третих