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Because, x is a variable, so it can mean any number ever known. It is called the "Unknown Quantity" simply because it represents the number that is not known in the equation. For exampe x+1=y So x and y are variables, each represents a number, if y=2 then it wold be x+1=2 and then you can figure out the "Unknown Quantity" which is 1.
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What is 3x in the equation?
"x" stands for any unknown or variable quantity; 3x means 3 times this quantity.
How much is x pence?
X is an unknown quantity. You would need the rest of the equation to figure out the value of X.
What is x plus 4 equals 92?
x is the 'unknown quantity' the sum is x+4=92 so an 'unknown quantity' has 4 added to it and the answer is 92, so if we now subtract 4 from 92 we will now know what the value of x is. 92-4= 88 so x=88
What does X means in Mathematics?
X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.
What is the equation for a number subtracted from -18 amounts to 156?
x - 18 = 156. The x is the unknown quantity, the rest of the equation you have. Now solve it and prove it.
