LESSON 3: Our main goal : The 'x' by its own      
Introduction to Elementary Algebra
Help on solving algebra math problems
Simple step by step method
Case 1.

Let’s say we were given this statement
As 5 divided by 5 is equal to 1 both fives disappear.

The result is that we keep the x alone, as we wanted.



Case 3.

Another example follows:
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How can we get rid of the 3 so we keep only the x?

Well, if the number 3 is multiplying by x … we simply divide by 3 to get
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Because 3 divided by 3 is equal to 1 we get x alone.
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Case 2.

Now let’s say we were given this statement
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How can we get rid of the 5 so we keep only the x?

The x is being divided by 5. In this case we multiply also by 5.
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How can we get rid of the 7 so we keep only the x?

The x is being added 7 units so we make just the opposite: we subtract 7 units.
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Because 7 – 7 is equal to zero both sevens disappear.

The x alone again.



Case 4.

This next example might seem difficult but it is actually very
simple
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Well, ‘x’ is being multiplied by 7/3. We must take the necessary action to
make the 7/3 disappear.

We ask ourselves: What is the opposite of 7/3?
Answer: Just invert the numbers. The answer is 3/7


Let’s do it
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Because 3/7 multiplied by 7/3 is equal to 1 we keep only the ‘x’.

What we just made is the same as dividing 7/3 by 7/3 which could also be
done and is also equal to 1. Again we are using the opposite operation.



Case 5.

Last example:         
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How can we get rid of the -2 so we keep only the x?

The x is being subtracted 2 units so we make just the opposite: we add 2 units.
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Because -2 + 2 is equal to zero both 'twos' disappear.

The x is alone again.


What we did in all 4 cases was simply using the
opposite operations using the same
numbers that were near the x.
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Mathematical Algebra
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Introduction to Elementary Algebra. Help on solving algebra math problems. Simple step by step method
Introduction to Elementary Algebra. Easy Elementary algebra lessons are meant to teach equations in the simplest way.
Introdução à Algebra - Matemática Ajuda na resolução de problemas matemáticos de Algebra Simples método com explicações passo a passo
Introdução à Algebra - Matemática. Estas lições de algebra elementar têm como objectivo o ensino simplificado e eficiente da resolução de equações.
Lesson 1: Things you should know before starting

Lesson 2: What does ‘equation’ mean?

Lesson 3: Our main goal: The 'x' by its own

Lesson 4: Ready to solve the equation

Lesson 5: Solved algebra examples 1

Lesson 6: Solved algebra exercises 2