x is a variable that represents an unknown number and its value depends on the algebraic expression it is used in.
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X or if it says what "x" equals then plug that in and multiply
we need to know the = 5x + 4 = ????? cant solve for x without the = ??? with what you gave me the answer could be 500,000,004
5X + 9 5(3) + 9 15 + 9 = 24 ====
3
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