Solve: x+y+z=561.5; 3.35y+5.6z=373; 5.6x+2.25y=2769.9; 3.35x+2.25z=1505.66
Pl find x,y and z.

Question

Solve:   x+y+z=561.5; 3.35y+5.6z=373; 5.6x+2.25y=2769.9; 3.35x+2.25z=1505.66
Pl find x,y and z.

anonymous · Answer

what grade u in? ahhh this is hard...sorry this isnt much help.

nottim · Answer

are these al lthe same values for x,y, and z? IS this vectors (i don't remember vectors well)?

anonymous · Answer

ya

nottim · Answer

both?

anonymous · Answer

linear equations

anonymous · Answer

Make x the subjext for the last equation and y the subject for the second equation. Then sub those into the first equation.

anonymous · Answer

YOu will get everything in z for the first equation once you do what I told you.

nottim · Answer

why not rearrange 1 of the equations that has 3 variables, and then substitute in another equation with 2 variables?

anonymous · Answer

Then you can solve for z and finally you can find y. and then x at the end.

anonymous · Answer

i tried all equations are coming same

nottim · Answer

well ,azteck's got this one covered.

anonymous · Answer

$$3.35x+2.25z=1505.66$$
$$3.35x=1505.66-2.25z$$
$$x=449.45 -\frac{45}{67}z$$

anonymous · Answer

ok

anonymous · Answer

Do the same thing for the second equaiton but in the second equation, make y the subject.

anonymous · Answer

I got to go somewhere. Toodles. Good luck with that.

anonymous · Answer

thanks