X+7.8=12.4

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Solution for X+7.8=12.4 equation: 


Simplifying
X + 7.8 = 12.4

Reorder the terms:
7.8 + X = 12.4

Solving
7.8 + X = 12.4

Solving for variable 'X'.

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

Add '-7.8' to each side of the equation.
7.8 + -7.8 + X = 12.4 + -7.8

Combine like terms: 7.8 + -7.8 = 0.0
0.0 + X = 12.4 + -7.8
X = 12.4 + -7.8

Combine like terms: 12.4 + -7.8 = 4.6
X = 4.6

Simplifying
X = 4.6

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