Răspuns
2x + 3y + 4z = 205
2x +2y + 2z+ y + 2z = 205
2 ( x + y + z )+ y +2z = 205
2 * 61 + y + 2z = 205
y + 2z = 205 -122
y + 2z = 83
2x + 3y + 4z = 205
2x + y + 2y + 2z +2z = 205
2x + y + (y + 2z) + (y + 2z) = 205
2x + y + 2(y + 2z) = 205
2x + y +2*83 = 205
2x + y = 205 - 166
2x + y = 39
x + y + z = 61
2x - x + y + z = 61
2x + y + z - x = 61
39 + z - x = 61
z - x = 61 - 39
z - x =22
(2x + y) (2z + y) (z - x) = 39 * 83 * 22 = 71214
Explicație pas cu pas: