m(k^2-9q^2)=7k^2+21kq

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Solution for m(k^2-9q^2)=7k^2+21kq equation: 


Simplifying
m(k2 + -9q2) = 7k2 + 21kq
(k2 * m + -9q2 * m) = 7k2 + 21kq
(k2m + -9mq2) = 7k2 + 21kq

Reorder the terms:
k2m + -9mq2 = 21kq + 7k2

Solving
k2m + -9mq2 = 21kq + 7k2

Solving for variable 'k'.

Reorder the terms:
-21kq + -7k2 + k2m + -9mq2 = 21kq + 7k2 + -21kq + -7k2

Reorder the terms:
-21kq + -7k2 + k2m + -9mq2 = 21kq + -21kq + 7k2 + -7k2

Combine like terms: 21kq + -21kq = 0
-21kq + -7k2 + k2m + -9mq2 = 0 + 7k2 + -7k2
-21kq + -7k2 + k2m + -9mq2 = 7k2 + -7k2

Combine like terms: 7k2 + -7k2 = 0
-21kq + -7k2 + k2m + -9mq2 = 0

The solution to this equation could not be determined.

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