Question

solve simultenous equations using Cramer's rule 2x+3y=2;x-y/2=1/2

Answer 1

a1 = 2; a2 =1 
b1 = 3 ; b2 = -1/2
c1 = 2 ; c2 = 1/2

Determinant  = | a1  b1 | = -1-3 = -4
                         | a2  b2 |
                         
x - matrix =       | c1   a1|  = 2-1 = 1
                         | c2   a2|

y - matrix =       | c1   b1|  = -1-3/2 = -5/2
                         | c2   b2|

x = 1/-4 = -1/4
y = -5/2 / -4 = 5/8
 

Answer 2

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