Answer: 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!
Step-by-step explanation:
<span>In algebra, you can use function __Notation______ to express the idea that salary depends on the number of hours of training.
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Simplest form of:
12/30=2/5
12/20=3/5
21/35=3/5
-10-f=-6f+10
-f+6f=10+10
5f=20
F=4
