2(x + y) + 3(x + y) code example

Example 1: y-2z = 3

[1]    3x = 60
   [2]    x + 2y = 30
   [3]    y - 2z = 3
   [4]    x + y + z = no solution

Example 2: x y = 1 2 python

>>> a,b = 1,2
>>> a
1
>>> b
2
>>> a,b,c = ['do', 're', 'mi']
>>> a
'do'
>>> b
're'
>>> c
'mi'
>>>