if 3x-y=7,ax+4y=11 and Dy=26 then a=
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Given : 3x - y = 7
ax + 4y = 11
Dy = 26
To Find : Value of a
Solution:
Using Cramer rule :
x = Dₓ/D
y = Dy/D
3x - y = 7
ax + 4y = 11
=> 3 * 11 - 7a = 26
=> -7a = -7
=> a = 1
Hence value of a = 1
on Solving x = 3 and y = 2
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