21(x-84)=42

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Solution for 21(x-84)=42 equation:


Simplifying
21(x + -84) = 42

Reorder the terms:
21(-84 + x) = 42
(-84 * 21 + x * 21) = 42
(-1764 + 21x) = 42

Solving
-1764 + 21x = 42

Solving for variable 'x'.

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

Add '1764' to each side of the equation.
-1764 + 1764 + 21x = 42 + 1764

Combine like terms: -1764 + 1764 = 0
0 + 21x = 42 + 1764
21x = 42 + 1764

Combine like terms: 42 + 1764 = 1806
21x = 1806

Divide each side by '21'.
x = 86

Simplifying
x = 86

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