christinathompson
christinathompson
08-05-2020
SAT
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what is the value of x
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oliviajanee328
oliviajanee328
11-05-2020
X. The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!
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