Question

a+b=77
a-b=13
a=?
b=?
Ma puteti ajuta va rog eu din suflet

Answer 1

a+b+a-b=77+13
2a=90
a=45
a+b=77
45+b=77
b=77-45
b=32

Answer 2

a+b+a-b=77+13 2×a = 90 a = 90 : 2 a = 45 a + b=77 45 + b =77 b = 77-45 b = 32 PROBĂ : a + b = 45 + 32 a + b = 77 a - b = 45 - 32 a - b = 13