X-15=(21)

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Solution for X-15=(21) equation: 


Simplifying
X + -15 = (21)

Reorder the terms:
-15 + X = (21)
-15 + X = 21

Solving
-15 + X = 21

Solving for variable 'X'.

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

Add '15' to each side of the equation.
-15 + 15 + X = 21 + 15

Combine like terms: -15 + 15 = 0
0 + X = 21 + 15
X = 21 + 15

Combine like terms: 21 + 15 = 36
X = 36

Simplifying
X = 36

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