2(x-3.90)=4.20

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Solution for 2(x-3.90)=4.20 equation: 


Simplifying
2(x + -3.90) = 4.20

Reorder the terms:
2(-3.90 + x) = 4.20
(-3.90 * 2 + x * 2) = 4.20
(-7.8 + 2x) = 4.20

Solving
-7.8 + 2x = 4.20

Solving for variable 'x'.

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

Add '7.8' to each side of the equation.
-7.8 + 7.8 + 2x = 4.20 + 7.8

Combine like terms: -7.8 + 7.8 = 0.0
0.0 + 2x = 4.20 + 7.8
2x = 4.20 + 7.8

Combine like terms: 4.20 + 7.8 = 12
2x = 12

Divide each side by '2'.
x = 6

Simplifying
x = 6

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