Question 899057
 <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi
2a-5b+c=1, c = 2-a  and b = -3 + 3c
2a - 5(-3+3(2-a)) + (2-a)= 1
2a - 5(3 - 3a) + 2 - a = 1
2a - 15 + 15a + 2 - a = 1
  16a = 14
    a = 14/16 = 7/8 
    c = {{{16/8 - 7/8}}} = 9/8
    b = {{{-3 + 27/8 = -24/8 + 27/8}}} = 3/8
OR
*[invoke cramers_rule_3x3 2,-5,1,1,1,0,1,2,0,1,-3,-3]