Y= 4x - 10
Y = -2x + 20
The solution of these would be when the two lines cross. Start by making the equations equal to each other
4x - 10 = -2x +20
Solve for x
6x - 10 =20
6x= 30
x= 5
Sub X back into either equation to find Y
Y= 4(5) - 10 = 20 - 10 = 10
Therefore X=5 and Y=10
(5 , 10)