an unknown. eg x+1=3 means something plus 1=3. the unknown, or 'something' must be 2. therefore x=2
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-iaminneed- it usually stands for a number.it also depends what kind of equation it is.
X, Y, and Z are all variables. When writing an equation they can stand for whatever you want them to, but when solving an equation that is what you typically are trying to find out. EX: 7x-7= 14 you would add 7 to both sides giving you 7x=21 and then solve for x which would be 7x/7=21/7 or x=3
The answer depends on the equation!
what is the equation
y=mx+b is the equation for a linear relationship. y= the dependant variable m= the slope of the line x= the independent variable b= the y-intercept