x-8.4=-21

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Solution for x-8.4=-21 equation: 


Simplifying
x + -8.4 = -21

Reorder the terms:
-8.4 + x = -21

Solving
-8.4 + x = -21

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 = -21 + 8.4

Combine like terms: -8.4 + 8.4 = 0.0
0.0 + x = -21 + 8.4
x = -21 + 8.4

Combine like terms: -21 + 8.4 = -12.6
x = -12.6

Simplifying
x = -12.6

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