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the symbol < means “is less than” and > that means “is greater than

More complicated equations may require using more than one property to solve it.

Two whole numbers can be added in either order because the result is the same. This is called commutative property of addition. There are other properties ...

Lines that are cut by a transversal may or may not be parallel

Adding the same number to both sides of an equation does not change its solution.

The converses of some statements are true, while the converses of other statements are false. It is interesting to note that the converse of the Pythagorean ...

Dividing both sides of an equation by the same nonzero number does not change its solution.