x + y + z = 1 944
(x + y + 100) : 2 = 1 000
x + y + 100 = 2 × 1 000
x + y = 2 000 - 100
x + y = 1 900
z = 1 944 - 1 900
z = 44
_____
x + z - 94 = 1 000
x + z = 1 000 + 94 = 1 094
y = 1 944 - 1 094
y = 850
______
x + y = 1 900
x + 850 = 1 900
x = 1 900 - 850
x = 1 050
________
Verificare:
1 050 + 850 + 44 = 1 944
(1 050 + 850 + 100) : 2 =
2 000 : 2 = 1 000
x + z - 94 =
1 050 + 44 - 94 =
1 094 - 94 = 1 000