{x + yz = 95 (1)
{ху + z = 94 (2)
(1) - (2)
y(z - x) + x - z = 1
y(z - x) - (z - x) = 1
(z - x)(y - 1) = 1
1) (1)*(1) = 1
2) (-1)*(-1) = 1
1)
{(z-x) = 1 => z = 1 +x
{(y-1) = 1 => y = 2
{ x + 2z = 95 => x + 2(1 + x) = 95 => 3x = 93 => x = 31
{2х + z = 94 => 2x + 1 +x = 94 => 3x = 93 => x = 31
z = 1 +x => 1 + 31 = 32
z = 32
x = 31; y = 2; z = 32
2)
{(z-x) = -1
{(y-1) = -1 => y = 0
{x + 0*z = 95 (1) => x = 95
{х*0 + z = 94 (2) => y = 94
x = 95; y = 94; z = 0