Question 147809
1.{{{7x-8y=-16}}}
2.{{{8y-7x=16}}}
Rearrange eq. 2, and multiply by (-1),
2.{{{(-1)(-7x+8y)=(-1)16}}}
2.{{{7x-8y=-16}}}
Eq. 1 and Eq. 2 are the same equation, consistent and dependent.