Answer:
7.) x=7
8.) x=7
Step-by-step explanation:
y=15x+5
180=15x+5+70
180=15x+75
you subtract 75 from 75 which gets rid of the 75. Then you subtract 75 from 180 and you get 105.
105=15x
Then you divide 15 by 15 and that will leave you with x on that side but you also have to divide 105 by 15 which equals 7.
x=7
you do the same thing with number eight to find x.