2x+21+7+x+20=

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Solution for 2x+21+7+x+20= equation:


Simplifying
2x + 21 + 7 + x + 20 = 0

Reorder the terms:
21 + 7 + 20 + 2x + x = 0

Combine like terms: 21 + 7 = 28
28 + 20 + 2x + x = 0

Combine like terms: 28 + 20 = 48
48 + 2x + x = 0

Combine like terms: 2x + x = 3x
48 + 3x = 0

Solving
48 + 3x = 0

Solving for variable 'x'.

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

Add '-48' to each side of the equation.
48 + -48 + 3x = 0 + -48

Combine like terms: 48 + -48 = 0
0 + 3x = 0 + -48
3x = 0 + -48

Combine like terms: 0 + -48 = -48
3x = -48

Divide each side by '3'.
x = -16

Simplifying
x = -16

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