6x+6(x+0.6)=21

Solution for 6x+6(x+0.6)=21 equation:

Simplifying
6x + 6(x + 0.6) = 21

Reorder the terms:
6x + 6(0.6 + x) = 21
6x + (0.6 * 6 + x * 6) = 21
6x + (3.6 + 6x) = 21

Reorder the terms:
3.6 + 6x + 6x = 21

Combine like terms: 6x + 6x = 12x
3.6 + 12x = 21

Solving
3.6 + 12x = 21

Solving for variable 'x'.

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

Add '-3.6' to each side of the equation.
3.6 + -3.6 + 12x = 21 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + 12x = 21 + -3.6
12x = 21 + -3.6

Combine like terms: 21 + -3.6 = 17.4
12x = 17.4

Divide each side by '12'.
x = 1.45

Simplifying
x = 1.45