859+х:6=1224
1)х:6=1224-859
2)х:6=365
3)х=365*6
4)х=2190
Ответ: х=2190.
Провера:
859+2190:6=1224
1)2190:6=365
2)859+365=1224
1224=1224
(z-30985)÷15=2269
z-30985=34035
z=65020
11, 22, 33, 44, 55, 66, 77, 88, 99
(х+0,75) : 2 1/4 = 2 1/9 : 1 3/4
(х+0,75) : 9/4 = 19/9 * 4/7
х+0,75=19/9 * 4/7 * 9/4
х+0,75 = 19/7
х = 19/7 - 75/100
х = 19/7 - 3/4
х = 76/28 - 21/28
х = 55/28
х = 1 27/28