-9
-y + 7 = 13 -y = 6 y = -6
-54
4x - y = 1 3x + y = 13 Simultaneous Equations. Add ; This will eliminate 'y' Hence 7x = 14 x = 2 When x = 2 3(2) + y = 13 6 + y = 13 y = 13 - 6 y = 7 Hence the solution in ( x,y) form is ( 2, 7).
-13
x equals -3, and y equals 1.
22
y=4
x = 8, y = -1
Parallel, the slope of the second equation is 4
2x+3y=13 3x-y=3 x=2
-2-5
y = (13 - 3x)/2 and that cannot be simplified further.