Step-by-step explanation: 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!
Answer: 2
Step-by-step explanation:
She would have 6 or 7 lessons 130 divided by 20 = 6.5
Answer:
Either one: the two line have a point in common, or infinite: they are the same line.