7.9+x=0.4

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Solution for 7.9+x=0.4 equation: 


Simplifying
7.9 + x = 0.4

Solving
7.9 + x = 0.4

Solving for variable 'x'.

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

Add '-7.9' to each side of the equation.
7.9 + -7.9 + x = 0.4 + -7.9

Combine like terms: 7.9 + -7.9 = 0.0
0.0 + x = 0.4 + -7.9
x = 0.4 + -7.9

Combine like terms: 0.4 + -7.9 = -7.5
x = -7.5

Simplifying
x = -7.5

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