Question

x-63+9=42
r+9-4+7=93

Answer 1

x- 63+9= 42
x-63= 42-9
x-63= 33
x= 33+63
x= 96

r+9-4+7= 93
r+9-4= 93-7
r+9-4= 86
r+9= 86+4
r+9= 90
r= 90-9
r= 81

asta e metoda mersului invers

Answer 2

x-63+9=42
42-9=33
33+63=96
x=96

r-9-4+7=93
93-7=86
89+4=93
93-9=84
r=84


Succes! ❤