Question 669520
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
2x - y = 4   {{{y = 2x-4)}}}

3x + y - z = 10
<u>y + z = 3</u>
   3x + 2y = 13
   3x + 2(2x-4) = 13
        7x = 21,   x = 3  and y= 2  and z = 1

Using Cramer's rule
*[invoke cramers_rule_3x3 2,-1,0,4,3,1,-1,10,0,1,1,3]