1)(х+98)+14=169
x + 98 + 14 = 169
x = 169 - 14 - 98
x = 57
(35+у)-15=31
35 + y - 15 = 31
y = -35 + 15 + 31
y = 11
(х+15)-8=17
x + 15 - 8 = 17
x = 17 + 8 - 15
x = 10
(10+15)-8=17
25-8=17
(24+х)-21=10
24 + x - 21 = 10
x = 10 - 24 + 21
x = 7
24 + 7 = 31 - 21 = 10
(45-у)+18=58
45 - y + 18 = 58
-y = -45 + 58 - 18
-y = -5
y = 5
45 - 5 = 40 + 18 = 58