5x-21=-66

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Solution for 5x-21=-66 equation:


Simplifying
5x + -21 = -66

Reorder the terms:
-21 + 5x = -66

Solving
-21 + 5x = -66

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 5x = -66 + 21

Combine like terms: -21 + 21 = 0
0 + 5x = -66 + 21
5x = -66 + 21

Combine like terms: -66 + 21 = -45
5x = -45

Divide each side by '5'.
x = -9

Simplifying
x = -9

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