How to check solutions
An equation works like this:
(left-hand side expression) = (right-hand side expression)
Therefore, an equation is only true if the left-hand side expression actually does equal the right-hand side expression. Take a look at your hands. Are they exactly the same?
It’s totally normal if they aren’t. Mostly, anyway. Um, maybe we’ll come back to this line of reasoning later.
To check if a given value is a solution to an equation:
Evaluate the left-hand side expression at the given value to get a number.
Evaluate the right-hand side expression at the given value to get a number.
See if the numbers match.

Graphing inequalities

When your graphing inequalities you have to watch out for the sign if it shows greater and less then sign then you would draw the circle but is it shows a sign like less then or equal to then you would draw a closed dot. There are 6 signs in total

What do these signs means
The first sign means that is less then for example you have X is less then 7 so you would use the first sign. The second sign means that is a bigger then so for example X is more then 8 so you would use that sign. The third sign means that it can be only be bigger or equal then so you would have X is bigger or equal to 7. The fourth sign means it is smaller or equal then 7.

In mathematics, an inequality is a relation which makes a non-equal comparison between two numbers or other mathematical expressions. It is used most often to compare two numbers on the number line by their size.

If you multiply both sides of inequality by the same positive number, the inequality buy the same positive number the inequity will be true. If you multiply both sides of an inequality by the same negative number and reverse the inequality symbol, the inequality will be true. Fi you divide both sides of an inequality by the same positive number the inequality will be true. If you divide both sides of an inequality by the same negative number and reverse the inequality symbol, the inequality will b