-100-21x=-520

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Solution for -100-21x=-520 equation: 


Simplifying
-100 + -21x = -520

Solving
-100 + -21x = -520

Solving for variable 'x'.

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

Add '100' to each side of the equation.
-100 + 100 + -21x = -520 + 100

Combine like terms: -100 + 100 = 0
0 + -21x = -520 + 100
-21x = -520 + 100

Combine like terms: -520 + 100 = -420
-21x = -420

Divide each side by '-21'.
x = 20

Simplifying
x = 20

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