(21+2x)=(x+84)

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Solution for (21+2x)=(x+84) equation:


Simplifying
(21 + 2x) = (x + 84)

Remove parenthesis around (21 + 2x)
21 + 2x = (x + 84)

Reorder the terms:
21 + 2x = (84 + x)

Remove parenthesis around (84 + x)
21 + 2x = 84 + x

Solving
21 + 2x = 84 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
21 + 2x + -1x = 84 + x + -1x

Combine like terms: 2x + -1x = 1x
21 + 1x = 84 + x + -1x

Combine like terms: x + -1x = 0
21 + 1x = 84 + 0
21 + 1x = 84

Add '-21' to each side of the equation.
21 + -21 + 1x = 84 + -21

Combine like terms: 21 + -21 = 0
0 + 1x = 84 + -21
1x = 84 + -21

Combine like terms: 84 + -21 = 63
1x = 63

Divide each side by '1'.
x = 63

Simplifying
x = 63

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