Найдите корень уравнения: a) (x + 15) – 8 = 17; б) (24 + x) – 21 = 10; в) (45 - y) + 18 = 58; г) (у – 35) + 12 = 32.

a) (x + 15) – 8 = 17

x + 15 = 17 + 8

x + 15 = 25

x = 25 - 15

x = 10

б) (24 + x) – 21 = 10

24 + x = 10 + 21

24 + x = 31

x = 31 - 24

x = 7

в) (45 - y) + 18 = 58

45 - y = 58 - 18

45 - y = 40

-y = 40 - 45

-y = -5

y = 5

г) (y – 35) + 12 = 32

y - 35 = 32 - 12

y - 35 = 20

y = 20 + 35

y = 55