how do i solve this using substitution?
5x+y=15
4x+4y=12
y = 15-5x
replace y into the other eq
4x+4(15-5x) = 12
4x + 60 - 20x = 12
-16x = -48
x = 3
plug 3 onto the fisrt or second eq to get Y..
y = 15-5x
y = 15-5(3)
y = 0
5x+y=15
4x+4y=12
replace y into the other eq
4x+4(15-5x) = 12
4x + 60 - 20x = 12
-16x = -48
x = 3
plug 3 onto the fisrt or second eq to get Y..
y = 15-5x
y = 15-5(3)
y = 0