It equals a simple linear equation in 'y'.
Its solution is 7/3 .
10-y=2y+3 10-3=2y+y 7=3y 7/3=y
The equation is -2y + 16 = 10
4
-65
X + ( 2Y - 2X - Y ) is equal to Y - X
y=4
(2, -1)
(4, -1)
4y+4 = 2y+12 4y-2y = 12-4 2y = 8 y = 4
4
2y+5y=10 7y=10 y=10/7
parallel