First off, you need to have your ys on the same side. Here's how to do it:
4y + 15 = -5y + 9
4y + 5y = 9 - 15 (once a number goes to the other side, it changes its sign)
9y = -6
y = -6/9
y = -2/3
The correct answer is B. -2/3
Answer: m=-1, b=-2
Step-by-step explanation:
With these types of problem, just remember to replace "is" with "="
and remember 60% also = 0.6
and let's called the amount x
so
486 = 0.6x
divide both sides by 0.6
and you'll get x which is the amount you are looking for
