а) (x+33) - 39 = 8x + 33 - 39 = 8x - 6 = 8x = 82 + x = 88
Проверка(88 + 33) - 39 = 8121 - 39 = 882 = 82
б) (y - 37) + 21 = 6y - 37 + 21 = 6y - 16 = 6y = 69 + 1y = 85
Проверка(85 - 37) + 21 = 648 + 21 = 669 = 69
в) (12 + x) - 129 = 4012 + x - 129 = 40x - 117 = 40x = 409 + 11x = 526
Проверка(12 + 526) - 129 = 40538 - 129 = 40409 = 409
г) (x + 6275) + 1231 = 917x + 6275 + 1231 = 917x + 7506 = 917x = 9177 - 750x = 1671
Проверка(1671 + 6275) + 1231 = 9177946 + 1231 = 9179177 = 9177
а) (x+33) - 39 = 8
x + 33 - 39 = 8
x - 6 = 8
x = 82 +
x = 88
Проверка
(88 + 33) - 39 = 8
121 - 39 = 8
82 = 82
б) (y - 37) + 21 = 6
y - 37 + 21 = 6
y - 16 = 6
y = 69 + 1
y = 85
Проверка
(85 - 37) + 21 = 6
48 + 21 = 6
69 = 69
в) (12 + x) - 129 = 40
12 + x - 129 = 40
x - 117 = 40
x = 409 + 11
x = 526
Проверка
(12 + 526) - 129 = 40
538 - 129 = 40
409 = 409
г) (x + 6275) + 1231 = 917
x + 6275 + 1231 = 917
x + 7506 = 917
x = 9177 - 750
x = 1671
Проверка
(1671 + 6275) + 1231 = 917
7946 + 1231 = 917
9177 = 9177