8.4+x=-3.9

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Solution for 8.4+x=-3.9 equation: 


Simplifying
8.4 + x = -3.9

Solving
8.4 + x = -3.9

Solving for variable 'x'.

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

Add '-8.4' to each side of the equation.
8.4 + -8.4 + x = -3.9 + -8.4

Combine like terms: 8.4 + -8.4 = 0.0
0.0 + x = -3.9 + -8.4
x = -3.9 + -8.4

Combine like terms: -3.9 + -8.4 = -12.3
x = -12.3

Simplifying
x = -12.3

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