Question

How do you solve this system of equations: `11x + 15y + 23= 0 and 7x - 2y - 20= 0`?

Answer 1

`x=2` and `y=-3`.

Explanation:

`2*(11x+15y+23)+15*(7x-2y-20)=0`

`22x+30y+46+105x-30y-300=0`

`127x=254`, so `x=2`.

Hence, `11*2+15y+23=0`,

`15y=-45`, so `y=-3`.