Posted by Michael on .
Use Cramer's Rule to solve each system of equations. a+b+5c=2
3a+b+2c=3
4a+2bc=3

Algebra 
Steve,
D =
1 1 5
3 1 2
4 2 1 = 16
Dx =
2 1 5
3 1 2
3 2 1 = 32
Dy =
1 2 5
3 3 2
4 3 1 = 80
Dz =
1 1 2
3 1 3
4 2 3 = 16
So, the solution
(x,y,z) = (Dx/D, Dy/D, Dz/D) = (2,5,1)