Question

Решите уравнения: (х+27)-12=42; 115-(35+у)=39;

Answer 1

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

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