7(2.8-4x)=2.1

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Solution for 7(2.8-4x)=2.1 equation: 


Simplifying
7(2.8 + -4x) = 2.1
(2.8 * 7 + -4x * 7) = 2.1
(19.6 + -28x) = 2.1

Solving
19.6 + -28x = 2.1

Solving for variable 'x'.

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

Add '-19.6' to each side of the equation.
19.6 + -19.6 + -28x = 2.1 + -19.6

Combine like terms: 19.6 + -19.6 = 0.0
0.0 + -28x = 2.1 + -19.6
-28x = 2.1 + -19.6

Combine like terms: 2.1 + -19.6 = -17.5
-28x = -17.5

Divide each side by '-28'.
x = 0.625

Simplifying
x = 0.625

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