We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website.
Please click on "Accept cookies" if you agree to the setting of cookies. Cookies that do not require consent remain unaffected by this, see
cookie policy and privacy policy.
DECLINE COOKIES

#2**+5 **

Thanks Badinage,

This is a very good question - one that is deserving of a proper answer.

I will try to give you some idea anyway

I will work through this example

3x+6 = -4+9

* First you need to simplify each side independently.

3x+6 cannot be simplified but -4+9=5 So the equation becomes

3x+6=5

Now you say - I want the lots of x by themself **so what do I want to get rid of**

ok I want to get rid of the +6 the opposite of +6 is minus 6 BUT

**if I minus 6 from one side I have to minus 6 from the other side too**. The equation must stay balanced!

3x+6=5

-6 -6

3x = -1

NOW I want the x by itself **so what do I need to get rid of**.

I need to get rid of the 3. How do I do that? Well between the 3 and the x is an invisable multiply sign

3*x=-1

The opposite of mult is divide and a divide is the same as a fraction line. **So I have to divide both sides by 3**

$$\\\frac{\not{3}*x}{\not{3}}=\frac{-1}{3}\\\\

x=\frac{-1}{3}$$

I hope that helps :)

Melody Apr 11, 2015

#1**+5 **

**The equation tells you. You subtract a term to make it vanish from a particular side of the equation, usually as part of your manouvering to isolate a variable by itself. In the process of making it disappear from one side, you inevitably cause it to appear on the other side.**

Just make sure you are even-handed, what you do to one side must also be done to the other. You can divide everything on one side by some number, as long as you divide all on the other side by that same number. (Just make sure you don't try to do any division by zero!)

** **

Badinage Apr 10, 2015

#2**+5 **

Best Answer

Thanks Badinage,

This is a very good question - one that is deserving of a proper answer.

I will try to give you some idea anyway

I will work through this example

3x+6 = -4+9

* First you need to simplify each side independently.

3x+6 cannot be simplified but -4+9=5 So the equation becomes

3x+6=5

Now you say - I want the lots of x by themself **so what do I want to get rid of**

ok I want to get rid of the +6 the opposite of +6 is minus 6 BUT

**if I minus 6 from one side I have to minus 6 from the other side too**. The equation must stay balanced!

3x+6=5

-6 -6

3x = -1

NOW I want the x by itself **so what do I need to get rid of**.

I need to get rid of the 3. How do I do that? Well between the 3 and the x is an invisable multiply sign

3*x=-1

The opposite of mult is divide and a divide is the same as a fraction line. **So I have to divide both sides by 3**

$$\\\frac{\not{3}*x}{\not{3}}=\frac{-1}{3}\\\\

x=\frac{-1}{3}$$

I hope that helps :)

Melody Apr 11, 2015