5X-21=66

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Solution for 5X-21=66 equation: 


Simplifying
5X + -21 = 66

Reorder the terms:
-21 + 5X = 66

Solving
-21 + 5X = 66

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '21' to each side of the equation.
-21 + 21 + 5X = 66 + 21

Combine like terms: -21 + 21 = 0
0 + 5X = 66 + 21
5X = 66 + 21

Combine like terms: 66 + 21 = 87
5X = 87

Divide each side by '5'.
X = 17.4

Simplifying
X = 17.4

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