Substitution method would go as follows 5x-2=7x-8 we than rearange it so it becomes 5x-7x=-8-2 this than becomes -2x=-6 so x=3 we can than substitute 3 for x in one of the first equations y=7 times 3-8 = 21-8 = 13 so therfore the interception should be at 3,13
