f/-5=-2
96/2x=3x
-6b=-18
0.16/0.168
-11x+2y=36
20x-47y=-90
solve for x and y
(x+4/2)(x+5)=x(x+4)-35
use echelon form to solve
X+2y-3z=0
3x+3y-z=5
x-2y+2z=1
4e=-12
x-1/6+4 =x-1/4 - 3x+5/2
if y varies directly as x and y = -3 when x= -4, find x when y=2
