3 + 11z = 20.5 + 16z11z - 16z = 20.5 - 3-5z = 17.5z = -3.5
13 - 9x = 12.5 + x13 - 12.5 = 9x + x0.5 = 10xx = 0.05
Ответ: z = -3.5, x = 0.05.
3 + 11z = 20.5 + 16z
11z - 16z = 20.5 - 3
-5z = 17.5
z = -3.5
13 - 9x = 12.5 + x
13 - 12.5 = 9x + x
0.5 = 10x
x = 0.05
Ответ: z = -3.5, x = 0.05.