X-78=45

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Solution for X-78=45 equation: 


Simplifying
X + -78 = 45

Reorder the terms:
-78 + X = 45

Solving
-78 + X = 45

Solving for variable 'X'.

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

Add '78' to each side of the equation.
-78 + 78 + X = 45 + 78

Combine like terms: -78 + 78 = 0
0 + X = 45 + 78
X = 45 + 78

Combine like terms: 45 + 78 = 123
X = 123

Simplifying
X = 123

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