Решите уравнения: a) y-27=45 б) 37+x=64 в) 63-(25+x) = 26 г) (х-653)+308 = 417

a) y - 27 = 45

y = 45 + 27

y = 72

б) 37 + x = 64

x = 64 - 37

x = 27

в) 63 - (25 + x) = 26

63 - 25 - x = 26

38 - x = 26

x = 38 - 26

x = 12

г) (x - 653) + 308 = 417

x - 653 = 417 - 308

x - 653 = 109

x = 109 + 653

x = 762