what is X in 2x +16=10

x is called the VARIABLE in the equation. The variable is a letter that represents a number that needs to be solved.

So, in this example

2x + 16 = 10

We first subtract 16 from both sides

2x + 16 - 16 = 10 - 16

2x = -6

x = -6/2

x = - 3

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