Răspuns :
a+b=115
a-b=35
a |-----|+35| }115
b |-----| }
115-35= 80
b=80:2
b=40
a=40+35
a=75
a + b = 115
a - b = 35
adunam relatiile
a + b + a - b = 115 + 35
2a = 150
a = 75
b = 115 - 75
b = 40
a+b=115
a-b=35
a |-----|+35| }115
b |-----| }
115-35= 80
b=80:2
b=40
a=40+35
a=75
a + b = 115
a - b = 35
adunam relatiile
a + b + a - b = 115 + 35
2a = 150
a = 75
b = 115 - 75
b = 40