1) 419 - (у - 9 ) = 36 419-y+9=36 -y=36-419-9 -y=-392 y=392 2)92 - ( 17 - b) = 89 92-17+b=89 b=89-92+17 b=14 3)(558+х) - 52 = 746 558+x-52=746 x=746-558+52 x=240