3x+3(x+7)=51

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Solution for 3x+3(x+7)=51 equation:


Simplifying
3x + 3(x + 7) = 51

Reorder the terms:
3x + 3(7 + x) = 51
3x + (7 * 3 + x * 3) = 51
3x + (21 + 3x) = 51

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

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

Solving
21 + 6x = 51

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 6x = 51 + -21

Combine like terms: 21 + -21 = 0
0 + 6x = 51 + -21
6x = 51 + -21

Combine like terms: 51 + -21 = 30
6x = 30

Divide each side by '6'.
x = 5

Simplifying
x = 5

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