3x-8y=24 y=x-8systems by substitution show all work

Just write down everything I have there all you have to do is replace the y with the y=x-8

It’s obvious the asnwer is false

Ghana, first of the great medieval trading empires of western africa (fl. 7th–13th century). it was situated between the sahara and the headwaters of the sénégal and niger rivers, in an area that now comprises southeastern mauritania and part of mali.