Oh honey, algebra is just a fancy way of saying we're gonna add some letters together. So, if you wanna know what x plus y is, well, it's just x plus y. No magic tricks here, just basic math. Hope that clears things up for ya!
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In algebra we consider x,y and z are variables.
The answer to the equation y x - x a would be x(y-1). When letters are used in a math expression, this is a form of math called Pre-Algebra or Algebra.
It is simply: yx which in algebra means y times x
y=x-2 y=x+4
Given two numbers, x and y their difference is |x - y|. |x - y| = x - y if X ≥ y and |x - y| = y - x if x < y