Question

Решить уравнение:(x+27)-12=42 и 115-(35+y)=39

Answer 1

(х+27)-12= 42
х+27 = 42+12
х+27 = 54
х= 54-27
х=27

115-(35+у) = 39
35+у = 115-39
35+у = 76
 у= 76 - 35
 у= 41

Answer 2

x+27-12=42

x=81

115-35-y=39

80-35-y=39

45-y=39

y=6