102=x+2x+21

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Solution for 102=x+2x+21 equation:


Simplifying
102 = x + 2x + 21

Reorder the terms:
102 = 21 + x + 2x

Combine like terms: x + 2x = 3x
102 = 21 + 3x

Solving
102 = 21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
102 + -3x = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
102 + -3x = 21 + 0
102 + -3x = 21

Add '-102' to each side of the equation.
102 + -102 + -3x = 21 + -102

Combine like terms: 102 + -102 = 0
0 + -3x = 21 + -102
-3x = 21 + -102

Combine like terms: 21 + -102 = -81
-3x = -81

Divide each side by '-3'.
x = 27

Simplifying
x = 27

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