a, b, c, d, e, f ; x, y . a, b, d, e ; c, f . .
.
1) , x, y:
x = (c by) / a. (2)
2) x:
d (c by) / a + ey = f.
3) , y:
y = (af cd) / (ae bd).
4) y (2):
x = (ce bf) / (ae bd).
. :
y:
x = (2y + 4) / 3.
y:
(2y + 4) / 3 + 3y = 5, y = 1.
, y : x = (2 1 + 4) / 3, x = 2.
. .
1) 1- (1) ( d), 2- :
: y = (af cd) / (ae bd).
2) y (1):
ax + b(af cd) / (ae bd) = c.
3) : x = (ce bf) / (ae bd).
. :
.
1, 3 :
y = 1.
( ?): 3x + 9 = 15, x = 2.
56. . :
x = (ce bf) / (ae bd),
(3)
y = (af cd) / (ae bd).
, :
, : ps qr.
p, q, r, s:
: ps qr. + , , ; - , . ,
.
57. :
a, b, c, d, e, f, g, h, p, q, r, s ; x, y, z . a, b, c, e, f, g, p, q, r ; d, h, s . , : . .
-, .
.
, , (2), . , , a, b, c ( +) c, a, b ( ), :
|
|
(2), (1) :
.
. :
. : D - (4),
Dx, Dy, Dz x, y, z .
(3), :
(4): x = Dx / D = 0 / 32 = 0;
y = Dy / D = 32 / 32 = 1; z = Dz / D = 64 / 32 = 2.