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Question Number 12265 by frank ntulah last updated on 17/Apr/17

D e t e r m i n a n t m e t h o d c a n b e u s e d t o s o l v e

t h e s y s t e m b e l o w ?, if yes solve by determinant method and

if no solve by another method

x + y - z = 8

2 x + y - 2 z = 3

(g i v e c l e a r r e a s o n f o r y o u r a n s w e r)

Commented by mrW1 last updated on 17/Apr/17

l e t u = x - z, t h e e q u a t i o n s y s t e m c a n b e

t r a n s f o r m e d i n t o

u + y = 8

2 u + y = 3

w h i c h c a n b e s o l v e d b y d e t e r m i n a n t

m e t h o d o r a n y o t h e r m e t h o d .

y = 13

u = - 5

\Rightarrow x = a n y r e a l n u m b e r

\Rightarrow y = 13

\Rightarrow z = x - u = x + 5

Commented by frank ntulah last updated on 17/Apr/17

thanks, God bless you sir