Question

How many independent equations are needed to solve a linear system of n variables?
1. 2n
2.n+1
3.n
4.n^2​

Answer 1

Answer:

With only two equations, two unknowns, 'independent' essentially means that one equation is not an exact multiple of the other. With more unknowns, it can be non-trivial to check that your equations are independent; unless you use techniques from linear algebra, you might need to start solving.

2n is answer