Question

Solve the following equation for y:

-4x +5y -20=0

Answer 1

We want to isolate y so First we have to move -4x and -20 to the other side. You know how to?

Answer 2

Do we add +4x to both sides?

Answer 3

Yes and add 20 to both sides.

Answer 4

You should get 5y = 4x + 20

Answer 5

It's not over yet. We want 5 to left y alone. What should we do?

Answer 6

I'm still having trouble getting 5y = 4x +20

Answer 7

Oh nevermind I got it.

Answer 8

So after we would add 4x to both sides right?

Answer 9

No, We don't have to do it again. We just want to get 5 to the other side. You know how to?

Answer 10

No, can you help me please? :)

Answer 11

All we have to do is divide both side by 5.\[\large{5y = 4x + 20}\]\[\large{\frac{5y}{5} = \frac{4x + 20}{5}}\]\[\large{y = \frac{4x + 20}{5}}\]

Answer 12

Do you understand?

Answer 13

Yes is that all?

Answer 14

Yeah, that it.

Answer 15

Do we have to plug in x?

Answer 16

oh nevermind, it's asking for y.