m3rk098 m3rk098
  • 22-04-2018
  • Mathematics
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11beehshahbaz 11beehshahbaz
  • 22-04-2018
The matrix A is the coefficient matrix and contains the coefficients of all variables.

The coefficient of equation 1 are mentioned in row 1 and coefficients of equation 2 are mentioned in row 2.

So,

a = 5
c = 7
b = 3
d = -2

So,

a - b + c + d = 5 - 3 + 7 - 2 = 7
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