Loading [MathJax]/jax/output/SVG/fonts/TeX/fontdata.js
 
+0  
 
0
594
1
avatar

If 4xy+2z=7,6x+3y+3z=5, compute y.

 Jan 9, 2019
 #1
avatar+37165 
0

Multiply FIRST equation by - 1.5 to get

-6x +1.5y -3z = -10.5      add it to second equation

6x +3y +3z =5

 

to get

 

4.5y = -5.5

y = -1.222      (  or  - 11/9)

 Jan 9, 2019
edited by ElectricPavlov  Jan 9, 2019

1 Online Users