0=5x-21

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Solution for 0=5x-21 equation: 


Simplifying
0 = 5x + -21

Reorder the terms:
0 = -21 + 5x

Solving
0 = -21 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
0 + -5x = -21 + 5x + -5x
Remove the zero:
-5x = -21 + 5x + -5x

Combine like terms: 5x + -5x = 0
-5x = -21 + 0
-5x = -21

Divide each side by '-5'.
x = 4.2

Simplifying
x = 4.2

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