answer:
6x+4y =28 -> y = -6/4x + 7
x + y =5 -> y = -x + 5
Explanation:
slope intercept form = y = mx + c
(If your in the US or some other part of the world it 'c' might be 'b' but it doesn't matter)
the goal is to rearrange for y on its own
6x +4y = 28
subtract 6x on both sides
4y = 28 - 6x
divide by 4 on both sides
y = 7 - 6/4x
as we want it in the form 'y=mx+c' we have to make the X come first
y = -6/4x + 7 (final answer)
now we just repeat this with the other one
x + y = 5
subtract x from both sides
y = 5 - x
again we want it in 'y=mx+c' so move X around
y = -x + 5
let me know if you don't understand anything