Answer:
2. y = -8x + 9
3. y = -1/6x - 1/3
4. y = -4/3x + 3
Explanation:
the goal for 2, 3, and 4 is to get them into y = mx + b form. to do this, we need to isolate y on one side of the equation
2. 8x + y = 9 < subtract both sides by 8x
y = -8x + 9
3. x + 6y = -2 < subtract x from both sides
6y = -x - 2 < divide both sides by 6 to get y alone
6y/6 = y
-x - 2 / 6 = -1/6 - 1/3
y = -1/6x - 1/3
4. 4x + 3y = 9 < subtract 4x from both sides
3y = -4x + 9 < divide both sides by 3 to get y isolated
3y/3 = y
-4x + 9/3 = -4/3x + 3
y = -4/3x + 3