4.2-2x=-12.8

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Solution for 4.2-2x=-12.8 equation: 


Simplifying
4.2 + -2x = -12.8

Solving
4.2 + -2x = -12.8

Solving for variable 'x'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + -2x = -12.8 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + -2x = -12.8 + -4.2
-2x = -12.8 + -4.2

Combine like terms: -12.8 + -4.2 = -17
-2x = -17

Divide each side by '-2'.
x = 8.5

Simplifying
x = 8.5

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