Прочитай предложения и вставь is или are. 1) There is a kitchen and three bedrooms in the house.

1) There is a kitchen and three bedrooms in the house.

2) There is no picture in the hall.

3) Is there a pantry in the house? - Yes, there are two pantries.

4) Are there any books in the bedroom?

a) (x + 15) - 8 = 17 => x + 7 = 17 => x = 17 - 7 = 10.
Проверка: (10 + 15) - 8 = 25 - 8 = 17.
б) (24 + x) - 21 = 10 => x + 3 = 10 => x = 10 - 3 = 7.
Проверка: (24 + 7) - 21 = 31 - 21 = 10;
в) (45 - у) + 18 = 58 => 63 - у = 58 => у = 63 - 58 = 5.
Проверка: (45 - 5) + 18 = 40 + 18 = 58.
г) (у - 35) + 12 = 32 => у - 23 = 32 => у = 23 + 32 => у = 55.
Проверка: (55 - 35) + 12 = 20 + 12 = 32.
д) 56 - (х + 12) = 24 => 44 - x = 24 => х = 44 - 24 = 20.
Проверка: 56 - (20 + 12) = 56 - 32 = 24.
е) 55 - (х - 15) = 30 => х - 15 = 55 - 30 => х = 25 + 15 = 40.
Проверка: 55 - (40 - 15) - 55 - 25 = 30.

а) (b + 179) - 89 = b + (179 - 89) = b + 90;
при b = 56 => b + 90 = 56 + 90 - 146;
при b = 75 => b + 90 = 75 + 90 = 165;
б) (839 + с) - 239 = с + (839 - 239) = с + 600;
при с = 37 => с + 600 = 37 + 600 = 637;
при с = 98 => с + 600 = 98 + 600 = 698;
в) (256 - х) - 156 = (256 - 156) - х = 100 - х;
при х = 44 => 100 - х = 100 - 44 = 56;
при х = 87 => 100 - х = 100 - 87 = 13;
г) 238 - (38 + а) - (238 - 38) - а = 200 - а;
при а = 78 => 200 - а = 200 - 78 = 122;
при а = 0 => 200 - а - 200 - 0 = 200.