21x=4(5x-2)

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Solution for 21x=4(5x-2) equation:


Simplifying
21x = 4(5x + -2)

Reorder the terms:
21x = 4(-2 + 5x)
21x = (-2 * 4 + 5x * 4)
21x = (-8 + 20x)

Solving
21x = -8 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
21x + -20x = -8 + 20x + -20x

Combine like terms: 21x + -20x = 1x
1x = -8 + 20x + -20x

Combine like terms: 20x + -20x = 0
1x = -8 + 0
1x = -8

Divide each side by '1'.
x = -8

Simplifying
x = -8

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