-267-(900)=
6=15+x
-2x+y=-4
2x-y-4=0
system of equation
x/3-2=10
-6*-4*-2
sin2θ=0.125
find θ
-4x-y=-8
-4x+y=-8
5 days of a year in a fraction
[1 1 1, 2 3 -1, 3 -1 -1] [6 7 6] solve using inverse coefficient matrix method
