2(2x-1)=21

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Solution for 2(2x-1)=21 equation:


Simplifying
2(2x + -1) = 21

Reorder the terms:
2(-1 + 2x) = 21
(-1 * 2 + 2x * 2) = 21
(-2 + 4x) = 21

Solving
-2 + 4x = 21

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + 4x = 21 + 2

Combine like terms: -2 + 2 = 0
0 + 4x = 21 + 2
4x = 21 + 2

Combine like terms: 21 + 2 = 23
4x = 23

Divide each side by '4'.
x = 5.75

Simplifying
x = 5.75

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