Answer: The letter x is often used in algebra to mean a value that is not yet known. it is called a variable or somethings an unknown in x + 2 = 7, x is a variable but we can work out its value if you try a variable does not have to be x though it could be y or w, or any letter, name or symbol. See: variable
Step-by-step explanation: and that's it! have a yummy cookie day! ◑﹏◐
Answer:
2i, if you don't understand any of the steps let me know, I'd be happy to explain.
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so in order -4 = -1 * 4 so then
then just solve each
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y=40
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k12
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