(x+18)+21=x+(18+21)

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Solution for (x+18)+21=x+(18+21) equation:


Simplifying
(x + 18) + 21 = x + (18 + 21)

Reorder the terms:
(18 + x) + 21 = x + (18 + 21)

Remove parenthesis around (18 + x)
18 + x + 21 = x + (18 + 21)

Reorder the terms:
18 + 21 + x = x + (18 + 21)

Combine like terms: 18 + 21 = 39
39 + x = x + (18 + 21)

Combine like terms: 18 + 21 = 39
39 + x = x + (39)
39 + x = x + 39

Reorder the terms:
39 + x = 39 + x

Add '-39' to each side of the equation.
39 + -39 + x = 39 + -39 + x

Combine like terms: 39 + -39 = 0
0 + x = 39 + -39 + x
x = 39 + -39 + x

Combine like terms: 39 + -39 = 0
x = 0 + x
x = x

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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