In algebra, the expression 1x - 1x simplifies to 0. This is because when you have the same variable with the same coefficient but with opposite signs, they cancel each other out. Thus, 1x - 1x leaves you with zero, as there is no value left after the subtraction.
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1x - 1x should be written as
x - x
the answe is '0' zero.
x-x = 0
NB In algebra 'x' or another letter, as an unknown ,but fixed amount. Its like saying
2 - 2 = 0 or 3 - 3 = 0 or 9 - 9 = 0
Instead of writing number(s) all the time, in algebra a letter is used to indicate all values, and the calculation is made once only.
NNB In algebra the coefficient '1' is NEVER used. So '1x' is incorrect. so 'x' on its own indicates that there is only 'one' of 'x'.
Since "pre-" means before, then pre-algebra would be before algebra. Conversely, algebra would be after pre-algebra. Generally, the next class after a pre-algebra class would be Algebra I, followed by Algebra II.
Pre-algebra preps you for algebra.2nd answer:Pre-AP-algebra is the same as Algebra I. Both are way harder than pre- algebra.
el algebra
Elementary algebra
Algebra 1 is a class/course that is on a higher level than Algebra.