115-(35+x)=39
115 – 35 – x = 39
– x = 39 + 35 – 115
-x = -41
x = 41
(x+27)-12=42
x + 27 – 12 = 42
x = 42 + 12 – 27
x = 27
115-(35+x)=39
115 – 35 – x = 39
– x = 39 + 35 – 115
-x = -41
x = 41
(x+27)-12=42
x + 27 – 12 = 42
x = 42 + 12 – 27
x = 27