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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