Q. 8
Solve each of the following systems of equations by the method of cross–multiplication.
x – ay = b
ax – by = c
Answer :
Given: the following systems of equations:
x – ay = b
ax – by = c
To find: The value of x and y
Explanation:
Method of cross multiplication
a1x + b1y + c1 = 0
a2x + b2y + c2 = 0
Here a1= 1 a2 = a
b1= –a b2 = – b
c1= b c2 = c
So, for the given system of equation:
Hence values of x and y are 
.
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