You need two equations for substitution to work (Ex. x + y = 2). Here, the best I can give you is 9x + 3y = 15 ... 3y = 15 - 9x ... y = 5 + 3x
It equals 285
-9
15 plus -3 equals 12 12 divided by -6 equals -2
-15 plus 20 is 5.
That equals 28
It is: y = 5x+15
It equals 285
45
y = -1.2x-3 in slope intercept form
30
-9
15 plus -3 equals 12 12 divided by -6 equals -2
8 plus 15 = 23
-15 plus 20 is 5.
No. It equals 15.
no
That equals 28