6[x+3]=21

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Solution for 6[x+3]=21 equation: 


Simplifying
6[x + 3] = 21

Reorder the terms:
6[3 + x] = 21
[3 * 6 + x * 6] = 21
[18 + 6x] = 21

Solving
18 + 6x = 21

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + 6x = 21 + -18

Combine like terms: 18 + -18 = 0
0 + 6x = 21 + -18
6x = 21 + -18

Combine like terms: 21 + -18 = 3
6x = 3

Divide each side by '6'.
x = 0.5

Simplifying
x = 0.5

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