Introduction to Elementary AlgebraHelp on solving algebra math problemsSimple step by step method |

Another equation we aim to solve:

What is the number that ‘x’ stands for?

We want something like

We want something like

With ‘x’ on the left and a number on the right.

Let’s start by making the 9 disappear. To do this we must subtract

9 from**BOTH sides** of the equation.

Let’s start by making the 9 disappear. To do this we must subtract

9 from

On the left side: 9 – 9 equals zero

On the right side: 4 – 9 equals -5

We now have

On the right side: 4 – 9 equals -5

We now have

Next step: 5/2 must go!

Well, 5/2 is multiplied by ‘x’ so we must divide by the same number

5/2. Or we can multiply by the opposite fraction 2/5. It’s easier.

Let’s do it on**BOTH sides**.

Well, 5/2 is multiplied by ‘x’ so we must divide by the same number

5/2. Or we can multiply by the opposite fraction 2/5. It’s easier.

Let’s do it on

On the left side: 2/5 times 5/2 is equal to 1. Because the ‘1x’ is the same as

only ‘x’ we got the ‘x’ alone on the left side.

On the right side: -5 times 2/5 is equal to -2

So the final answer is

only ‘x’ we got the ‘x’ alone on the left side.

On the right side: -5 times 2/5 is equal to -2

So the final answer is

Which is true if we try to use -2 instead of ‘x’ in the starting equation.

Congratulations!The equation is solved ! |

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Bye for now. More answers to algebra problems examples in a few days.