4=-3x+31

4=-3x+31

The aim is to get x by itself on the left hand side.

Before you can get x by itself you have to get the lots of x by itself.

So you want to get -3x by itself on one side.

ok, to do this you will need to get rid of +31

How can you do this?  Well you could take it away, but if you do then you will need to take it away from the other side as well because equations must stay balanced.

4=-3x+31

4-31=-3x+31-31

-27=-3x

-27=-3 * x

Now you need to get rid of the -3

What is the opposite of multiply by 3,  divide by 3 is and divide is the same as a fraction line.

$$\\-27=-3 * x\\\\
\frac{-27}{-3}=\frac{-3*x}{-3}\\\\
9=x \qquad $The -3's cancel out$\\\\
x=9$$

Nice Melody!!!

Well explained!!!

:D

Thanks MG

Did you learn something from that ?

I wanted a recap of what i learnt, i kinda did learn something.

Since you been teaching me that way i've been presenting my work like that.

Before i didn't add the divide bit with the fraction when dividing x to be just x. Usually i do it in my head.