8.4-x=4.2

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Solution for 8.4-x=4.2 equation: 


Simplifying
8.4 + -1x = 4.2

Solving
8.4 + -1x = 4.2

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 + -1x = 4.2 + -8.4

Combine like terms: 8.4 + -8.4 = 0.0
0.0 + -1x = 4.2 + -8.4
-1x = 4.2 + -8.4

Combine like terms: 4.2 + -8.4 = -4.2
-1x = -4.2

Divide each side by '-1'.
x = 4.2

Simplifying
x = 4.2

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