xojade
09.07.2019 •
Mathematics
Three less than 2 times a number is 55. what is the number?
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Ответ:
2x-3=55
2x=55-3
2x=52
x=52/2
x=26
Ответ:
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! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol.
Step-by-step explanation: