Question

how do i solve this?

Answer 1

First see if the equations are linearly independent

Answer 2

then?

Answer 3

then you will realize that they're not. So... there's a theorem that talks about equation systems, you need n independant equations to solve a system with n incognites.

Answer 4

idk how to do that

Answer 5

well, multiply the first equation by 3.5 and tell me what happens