Math
posted by Lea .
Sorry!
I have another problem!
42y=4y
I always get a bit confused if there's a minus sign in front of a number.
The book says the answer is 2/3
So what I first did was.
42y=4y
4=6y
which is 1 1/2, and wrong.?

4=6y
divide both sides by 6
2/3=y 
42y=4y
4  2y + 2y = 4y + 2y
4 = 6y
Here you need to divide by sides of the equation by 6.
4/6 = y