Question

How do you find the solution of the system of equations `-6x-7y=-34` and `2x+3y=18`?

Answer 1

`"[1] "-6x-7y = -34`
`"[2] "2x+3y=18`

`"[3] = [2]"xx 3" "6x+9y=54`

`"[4] = [1]+[3] " 2y =20`
`rarr y = 10`

Substituting `y=10` back into `"[2]"`
`2x+3(10) = 18`
`2x=-12`
`x=-6`

Solution to given system of equations:
`(x,y) = (-6,10)`