# Equal Sign

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Equal Sign | The equals sign or equality sign (=) is a mathematical symbol used to indicate equality. It was invented in 1557 by Robert Recorde. In an equation, the equals sign is placed between two expressions that have the same value. ## What is an equal sign (=)?The equal sign (=) is the mathematical symbol for equality. Invented by 16th century Welsh physician Robert Recorde, who also brought the plus sign (+) to the English. The sign appears between two mathematical units that amount to the same value: *4 + 2 = 6**12 × 3 = 36**98 – 47 = 51**75 ÷ 5 = 15*
Recorde first used the symbol in his 1557 book The word "equal" derives from aequalis, the Latin word for "uniform." ## Examples of useThe following different uses can be made of the equal sign in mathematics: *Statements of fact: x = 8**Creations of definition: let x = 9**Conditional statements: if x = 7, then…**Universal equivalence: 4 × 3 = 6 + 6*
Early math students sometimes wind up using the equal sign incorrectly by attempting to demonstrate equal values in an unorthodox manner. For instance, if someone was looking for the sum of 2, 3, 6, 9, and 12, the argument might look like this: *2 + 3 = 5 + 6 = 11 + 9 = 20 + 12 = 32*
Technically, this would be an attempt at saying the following: *([(2 + 3 = 5) + 6 = 11] + 9 = 20) + 12 = 32*
Trouble is, the first notation won't work due to the differing value of each equality, which would actually be stating the following if taken to its conclusion: *5 = 11 = 20 = 32 = 32*
For the initial argument to work, it would need to be written like this: *2 + 3 = 5, 5 + 6 = 11, 11 + 9 = 20, 20 + 12 = 32*
## Other uses of the equal sign (=)The equal sign first appeared in computer code during the mid 1950s with the program The equal sign has been put to unorthodox use among select individuals with double-barreled names who have applied it in lieu of hyphens. A notable example was 1900s Brazilian aviation pioneer Hits - 239 |