Question

How do you solve this system of equation: `y= 2x - 13 and 5x - 4y = 40`?

Answer 1

`x=4` and `y=-5`

Explanation:

After plugging first equation into second one,

`5x-4*(2x-13)=40`

`5x-8x+52=40`

`52-3x=40`

`-3x=-12`, so `x=(-12)/(-3)=4`

Thus, `y=2*4-13=-5`