4(2x-1)=21

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Solution for 4(2x-1)=21 equation: 


Simplifying
4(2x + -1) = 21

Reorder the terms:
4(-1 + 2x) = 21
(-1 * 4 + 2x * 4) = 21
(-4 + 8x) = 21

Solving
-4 + 8x = 21

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 8x = 21 + 4

Combine like terms: -4 + 4 = 0
0 + 8x = 21 + 4
8x = 21 + 4

Combine like terms: 21 + 4 = 25
8x = 25

Divide each side by '8'.
x = 3.125

Simplifying
x = 3.125

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