MathSystem of Equations
posted by Lilly .
1. Solve for x, y, z in the following system:
2x3y2=z
yx+z=1
y2z=7
The answers are: x=7 y=5 and z=1 however I don't know how to go about this.

From the 3rd: y = 2z7
in the 1st:
2x  3(2z7)  z = 2
2x +6z +21  z = 2
2x + 5z = 19 (#4)
in the 2nd:
2z  7  x + z = 1
x + z = 8
2x + 2z = 16 (#5)
#4  #5 :
3z = 3
z = 1
sub into y = 2z7 > 27 = 5
sub into 2nd:
5  x  1 = 1
x = 7
x = 7
so , x = 7, y = 5 and z = 1
Respond to this Question
Similar Questions

algebra
solve the system of equations by graphing. Then classify the system as consistent or inconsistent and the equations as dependent or independent. x+y=14 xy=2 What is the solution of the system of equations? 
alegebra
solve the system of equations by graphing. then classify the system as consistent or inconsistent and the equations as dependent or independent. 3u+v=13 3u=v+29 What is the solution of the system of equations? 
College Algebra
Solve the system of equations. Then classify the system. 7x7y= 42 7y7x=42 What is the solution of the system? 
Math  system of equations
write two other equations that have the same solution as this system od equations. 3x4y=14 x+3y=18 I found the solution to the system it is (6,8) there after how do i go about it? 
Alg 2
Today we learned how to solve systems of equations with 3 variables, however my teacher didn't go over how to do a problem where not every single equation in the system has the 3 variables. Can someone point me to a place that explains … 
math
Consider the following system of equations. Y = 3x – 7 Y  3x = 5 a) The system of equations is inconsistent. b) The system of equations is dependent. c) The system of equations is independent. d) none of these 
Math 116
Consider the following system of equations. y=2x2 y2x=9 What can you conclude about the system of equations? 
Math 1
Consider the following system of equations. y = 4x  4 y  4x = 3 What can you conclude about the system of equations? 
math
Consider the following system of equations. y = 2x  2 y  2x = 7 What can you conclude about the system of equations? 
Algebra
Find the number of the solutions to each system. a. 4xy+1=0 4xy+3=0 b. 2xy+4=0 4x2y+8=0 Write a question that can be solved using a system of linear equations. Solve the following system of equations by graphing: y=x+3 and y=2x3