Posted by david on Monday, July 8, 2013 at 6:07am.
4x+y32=1, 6xy4z=7, 10x+2y6z=5 pls show me how to solve for x,y,z. Ans:xx=1.5,y=2,z=1

(pls help) algebra  Steve, Monday, July 8, 2013 at 9:04am
here are several ways to do this (as I'm sure your textbook will show  read it, and do web searches for alternate presentations).
Substitution:
(1) 4x+y3z = 1
(2) 6xy4z = 7
(3) 10x+2y6z = 5
From (1) we see that y = 4x+3z+1, so plug that into (2) and (3):
6x  (4x+3z+1)  3z = 7
10x + 2(4x+3z+1)  6z = 5
or
(4) 10x 6z = 8
(5) 2x = 3
From (5) we see x = 3/2
Plug that into (4) and z = 1
Plug x and z into any of the original equations and y = 2
Besides substitution, there's elimination, determinants, matrices, and other methods.

(pls help) algebra  Steve, Monday, July 8, 2013 at 9:11am
Extra credit: find and fix my typo.
Answer This Question
Related Questions
 math help pls pls pls  Choose the polynomial written in standard form. x^3y^2...
 math help pls pls pls  Given f(x) = 4x + 13 and g(x) = 10x − 2, solve for...
 Math  Can u pls pls pls solve this algebraic expression?? I cant solve it ...
 math pls help!!!!!  these are the few i don't know/im not sure. pls help! The ...
 algebra  (3x squared10x)divided by(x6)=3x+8+48/x6. but i have no idea how ...
 science help  How can you describe the location of hafnium (Hf, atomic number ...
 algebra1 question  Multiply x+2/5x15 * (10x^2  25x  15) A. (2x+1)/5(x3) B...
 algebra pls pls help  Factor completely: 2x^3 + 14x^2 + 6x + 42? A. 2[(x^2 + 3...
 math help pls pls pls  The graph below plots the values of y for different ...
 science  pls. pls. pls. somebody help me...you see im on a science class and i ...
More Related Questions