8400-.4=x

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Solution for 8400-.4=x equation:


Simplifying
8400 + -0.4 = x

Combine like terms: 8400 + -0.4 = 8399.6
8399.6 = x

Solving
8399.6 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
8399.6 + -1x = x + -1x

Combine like terms: x + -1x = 0
8399.6 + -1x = 0

Add '-8399.6' to each side of the equation.
8399.6 + -8399.6 + -1x = 0 + -8399.6

Combine like terms: 8399.6 + -8399.6 = 0.0
0.0 + -1x = 0 + -8399.6
-1x = 0 + -8399.6

Combine like terms: 0 + -8399.6 = -8399.6
-1x = -8399.6

Divide each side by '-1'.
x = 8399.6

Simplifying
x = 8399.6

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