Question

$$a = 7 , b = 5 , c = 3 , a ^ { 2 } + b ^ { 2 } + c ^ { 2 } - a b - b c - c a z$$

Solve for a, b, c, d, z (complex solution)

$d=33-21z$

Solve for a, b, c, d, z

$d=33-21z$