# How do you solve the system of equations 7x - 8y = - 16 and 8y - 7x = 16?

Jun 8, 2018

If $7 x - 8 y = - 16$ and $8 y - 7 x = 16$,
if you add them together you only get $0 = 0$
Both say that $7 x = 8 y - 16$, and you need a different equation that gives a different result.