6.4-2.1x=-77.4

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Solution for 6.4-2.1x=-77.4 equation: 


Simplifying
6.4 + -2.1x = -77.4

Solving
6.4 + -2.1x = -77.4

Solving for variable 'x'.

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

Add '-6.4' to each side of the equation.
6.4 + -6.4 + -2.1x = -77.4 + -6.4

Combine like terms: 6.4 + -6.4 = 0.0
0.0 + -2.1x = -77.4 + -6.4
-2.1x = -77.4 + -6.4

Combine like terms: -77.4 + -6.4 = -83.8
-2.1x = -83.8

Divide each side by '-2.1'.
x = 39.9047619

Simplifying
x = 39.9047619

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