I believe the slope of the line is 1/3
Subtract 3 first so it would be 7x=15
then divide by 7 so x would be approximately 2.14
15:10
3:2
Hope this helps :)
First you solve for y.
5x+ y= 12 so Y= 12-5x
And plug it into the next equation
3x- 3(12-5x) = 18
Distribute
3x-36+15x=18
Add 36 to both sides
3x+ 15x= 54
18x= 54 ... divide
x= 3
And you can plug in x to solve for Y
5(3) + y = 12
15+ y = 12 ...subtract 15 from both sides
y= -3
