Question

How so I solve x=3 3x+y=15 ? Thank you

Answer 1

`(x,y)to(3,6)`

Explanation:

`x=3to(1)`

`3x+y=15to(2)`

`"substitute "x=3" into equation "(2)`

`rArr9+y=15`

`"subtract 9 from both sides"`

`rArry=15-9=6`

`"the point of intersection of the 2 lines "=(3,6)`
graph{(y+3x-15)(y-1000x+3000)=0 [-12.66, 12.65, -6.33, 6.33]}