| 1 | initial version |
With solve_ineq, you should put equations and variables in a list:
sage: s1 = solve_ineq([x_1 - 2*x_0 <= 20], [x_1])
sage: s1
[[x_1 == 2*x_0 + 20], [x_1 < 2*x_0 + 20]]
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