Consider the following linear equations: 7x+6y + 5z = -7 7x + (18k)y + 4z = -5 7x+6y + (9-k)z =k+-3 a) Suppose the above equation is expressed as Ax = b with x = matrix form as (Ab)= 7 7 7 6 5 X1 x3 Express the coefficients of the equations in one -7

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