4(5x-1)=21

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Solution for 4(5x-1)=21 equation: 


Simplifying
4(5x + -1) = 21

Reorder the terms:
4(-1 + 5x) = 21
(-1 * 4 + 5x * 4) = 21
(-4 + 20x) = 21

Solving
-4 + 20x = 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 + 20x = 21 + 4

Combine like terms: -4 + 4 = 0
0 + 20x = 21 + 4
20x = 21 + 4

Combine like terms: 21 + 4 = 25
20x = 25

Divide each side by '20'.
x = 1.25

Simplifying
x = 1.25

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