6x+21=3(x+1)

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Solution for 6x+21=3(x+1) equation:


Simplifying
6x + 21 = 3(x + 1)

Reorder the terms:
21 + 6x = 3(x + 1)

Reorder the terms:
21 + 6x = 3(1 + x)
21 + 6x = (1 * 3 + x * 3)
21 + 6x = (3 + 3x)

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

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

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

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

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

Combine like terms: 3 + -21 = -18
3x = -18

Divide each side by '3'.
x = -6

Simplifying
x = -6

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