x+21=2(x+1)+2

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Solution for x+21=2(x+1)+2 equation:


Simplifying
x + 21 = 2(x + 1) + 2

Reorder the terms:
21 + x = 2(x + 1) + 2

Reorder the terms:
21 + x = 2(1 + x) + 2
21 + x = (1 * 2 + x * 2) + 2
21 + x = (2 + 2x) + 2

Reorder the terms:
21 + x = 2 + 2 + 2x

Combine like terms: 2 + 2 = 4
21 + x = 4 + 2x

Solving
21 + x = 4 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
21 + x + -2x = 4 + 2x + -2x

Combine like terms: x + -2x = -1x
21 + -1x = 4 + 2x + -2x

Combine like terms: 2x + -2x = 0
21 + -1x = 4 + 0
21 + -1x = 4

Add '-21' to each side of the equation.
21 + -21 + -1x = 4 + -21

Combine like terms: 21 + -21 = 0
0 + -1x = 4 + -21
-1x = 4 + -21

Combine like terms: 4 + -21 = -17
-1x = -17

Divide each side by '-1'.
x = 17

Simplifying
x = 17

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