Question

115-(35+X)=39
(X+27)-12=42

Answer 1

115-(35+#)=39. (#+27)-12=42
35+#=115-39 #=42+12-27
35+#=76. #=27
#=76-35
#=41

Answer 2

1)115-(35+х)=39
115-35-х=39
80-х=39
-х=-41
х=41
2)(х+27)-12=42
х+27-12=42
х+15=42
х=42-15
х=27