6x+21=3x+51

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Solution for 6x+21=3x+51 equation:


Simplifying
6x + 21 = 3x + 51

Reorder the terms:
21 + 6x = 3x + 51

Reorder the terms:
21 + 6x = 51 + 3x

Solving
21 + 6x = 51 + 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.
21 + 6x + -3x = 51 + 3x + -3x

Combine like terms: 6x + -3x = 3x
21 + 3x = 51 + 3x + -3x

Combine like terms: 3x + -3x = 0
21 + 3x = 51 + 0
21 + 3x = 51

Add '-21' to each side of the equation.
21 + -21 + 3x = 51 + -21

Combine like terms: 21 + -21 = 0
0 + 3x = 51 + -21
3x = 51 + -21

Combine like terms: 51 + -21 = 30
3x = 30

Divide each side by '3'.
x = 10

Simplifying
x = 10

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