Algebra is a type of mathematics which uses letters to represent possible numbers and quantities in equations. Algebra can be useful in solving real world problems as the letters can be used to represent real things.

Question: X + 5 = 10

What is the value of X?

Video Guide

Step 1 – Rearrange The Equation

Make X the the subject of the equation

X = 10 – 5

Note: If you move a positive value (+5) to the other side of the equation it becomes a negative value (-5).

Step 2 – Solve

X = 10 – 5

X = 5

(The next step is to check that your working is correct and is not required to answer the question.)

Step 3 – Validate

Substitute the value of X into the equation

5 + 5 = 10

If both sides are equal the equation has been solved.

Algebra is my favourite Mathematics, I think. Mathematics was my favourite subject in high school. 😁

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I took calculus and differential equations, but it’s algebra I used for my job.

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Very nice and informative. thanks

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Well explained – simple and lucid.

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Wow smartly explained. 👌🏻

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Thanks for likeing a post of mine other wise I would never find this website because I get confused in math. Thanks!

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Thank you for your post. This helps all of us. Keep up the good work.

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Thanks for the encouragement.

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I like to think of it as doing the same operation to both sides of the equation, so if you subtract 5 from both sides you have

X + 5 = 10

subtract 5 from both sides

X + 5 – 5 = 10 – 5

this isolates x

x = 5

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Nice idea!

This is also a good way of solving it.

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This is really helpful!

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Glad to discover your blog. I will share with my students.

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I didn’t do well in high school algebra!

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