At first we form a matrix using the coefficients of the given equations
Using that we solve the equations
So we found X3 = 13/33 or 0.3939
Substiting this in equation 2
5X2 + 6(0.3939) = 11
5X2 + 2.3634 = 11
X2 = 1.7273
Substiting these values in Equation 1
4X1 + 5(1.7273) + 7(0.3939) = 16
4X1 + 11.3938 = 16
4X1 = 4.6062
X1 = 1.1515
Note : We can cross check the values by substituting these values into the given equations.
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