X+(x-7)=21

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Solution for X+(x-7)=21 equation:


Simplifying
X + (x + -7) = 21

Reorder the terms:
X + (-7 + x) = 21

Remove parenthesis around (-7 + x)
X + -7 + x = 21

Reorder the terms:
-7 + X + x = 21

Solving
-7 + X + x = 21

Solving for variable 'X'.

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

Add '7' to each side of the equation.
-7 + X + 7 + x = 21 + 7

Reorder the terms:
-7 + 7 + X + x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + X + x = 21 + 7
X + x = 21 + 7

Combine like terms: 21 + 7 = 28
X + x = 28

Add '-1x' to each side of the equation.
X + x + -1x = 28 + -1x

Combine like terms: x + -1x = 0
X + 0 = 28 + -1x
X = 28 + -1x

Simplifying
X = 28 + -1x

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