Can somebody show me how to solve these?
3x+17y+4z=119
2x+3y+15z=87
10x+4y+7z=108

Question

anonymous · Answer

In a class so Don;t have the time to go into detail. Long and short, you need to choose a variable to solve for and start substituting, i.e. solve for x and y and substitute it back in.

$$z=\frac{119}{4} - \frac{3x}{4}-\frac{17y}{4}$$

anonymous · Answer

Plug this into another one of the problems and then solve for x or y.

anonymous · Answer

I think this can also be solved with matrices or vectors but I haven't taken math of that level yet.

anonymous · Answer

I don't quite understand... maybe somebody else can help, too??

precal · Answer

Look  at your other posting.  I started the problem for you.   Yes, you can do a matrix.