(Solve the equation using property of determinant)
5. Solve the equation
, a ≠ 0
Apply R1->R1+R2+R3 we get
Take 3x+a common from first row we get
Apply C2->C2-C1 and C3->C3-C1 we get
Open the expansion using first row we get
ð 3x+a= 0
3x = - a
x = - a/3
Answer x = -a/3 
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