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Q: How can you use symbols to write addition and subtraction equations?

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30 -5 =x

3-3=0

What you write for PEMDAS is P (parenthesis) E exponents M multiplication D division A addition S subtraction!

They use symbols because the words are too long to actually write so instead they find the right symbol and write that instead. Also they must actually have a reason. I hope this helped if not I'm sorry.

14 more than a nomber x

They are a shorthand notation to all writing chemical equations without complete words and names. They are a way to make these things simpler to write.

Addition and subtraction are prehistoric, they were used before man could write, even som animals addd and subtract (raven, crows, apes, etc.)

mesured mass-mass by subtraction/mass by subtraction * 100%

If you mean "spell" as meaning "to name or write letters of any word," then it's Subtraction.

if y = xa then a = logxy

Symbols are an efficient means of conveying certain types of information which would otherwise be much more difficult to write. For example, a two letter symbol of a chemical element is much more convenient, when you are writing chemical formulas or equations, than writing out the full names of the elements.

—Symbols are required to make knowledge of studies made useful and easy. —Symbols helps to make equations and other data short and concise. —Symbols enable us to make us write the word quicker and are understood around the world. —Symbols are very useful for scientists as it would take much more time and paper to do their job if they had to write out the full name of every element instead of its symbol. Writing NaCl is much faster than writing Sodium-Chloride.

It appears that some symbols may be missing from your question. When you resubmit your question please take care to write them using only alphabetic characters so that answerers can see them.

it must be cleared that while writing a chemical equation... it must be in symbols of that element then the numbers of the atoms used in the reaction must be equated to both the sides that is it must be equal to right hand side as well as left hand side... we need to remember the symbols of that element

what are you talking about? Koreans don't write with symbols, they have their own alphabet. if you categorize the Korean alphabet as symbols then all the known languages write with symbols technically i guess all the writing systems are symbols because the marks stand for something else like sounds and such

They did not write they draw symbols

4+9=13

It's easier to navigate the periodic table and write chemical equations and formulae once you know the symbols for the elements. However, sometimes it's easy to confuse symbols of elements with similar names. Other elements have symbols that don't seem to relate to their names at all! For these elements, the symbol usually refers to an older element name that isn't used any more. Here's an alphabetical list of element symbols with the corresponding element name. Keep in mind that the names for the elements (and their symbols) may be different in languages other than English.

In Roman symbols or numerals 306 is equivalent to CCCVI

We have chemical symbols so that we can quickly write about an element or compound with out having to write out the name every time you want to refer to it.

2x - 17 = 35

Examples: Write the first integer as it is, turn the subtraction into the addition, change the sign of the second integer, and follow the rules of addition. -7 - (2) = -7 + (-2) = -(7 + 2) = -9 10 - (-8) = 10 + (+8) = 18

You can write an equivalent equation from a selected equation in the system of equations to isolate a variable. You can then take that variable and substitute it into the other equations. Then you will have a system of equations with one less equation and one less variable and it will be simpler to solve.

A - B = A + (-B) A - B = A + (-B) A - B = A + (-B) A - B = A + (-B)

In Roman numerals or symbols 378 is equivalent to CCCLXXVIII