Răspuns :
1) a+b=812
a=525
525+b=812
b=812-525
b=287
2) 915-x=730
x=915-730
x=185
3) x-215=319
x=319+215
x=534
a=525
525+b=812
b=812-525
b=287
2) 915-x=730
x=915-730
x=185
3) x-215=319
x=319+215
x=534