Question

решите уравнения 2 способами:
(x+27)-12=42
115-(35+у)=39
z-35-64=16
28-t+35=53

Answer 1

Х+27=42-(-12)
Х+27=54
Х=54-27
Х=27

Х+27-12=42
Х=42-27+12
Х=27

35+y=115-39
35+у=76
У=76-35
У=41
115-35-у=39
115-35-39=y
Y=41
Z-99=16
Z=16+99
Z=115
28-т=53-35
28-т=18
Т=28-18
Т=10
Т=53-28-35
-т=-10
Т=10