3x+2(x+6)=21

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Solution for 3x+2(x+6)=21 equation:


Simplifying
3x + 2(x + 6) = 21

Reorder the terms:
3x + 2(6 + x) = 21
3x + (6 * 2 + x * 2) = 21
3x + (12 + 2x) = 21

Reorder the terms:
12 + 3x + 2x = 21

Combine like terms: 3x + 2x = 5x
12 + 5x = 21

Solving
12 + 5x = 21

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 5x = 21 + -12

Combine like terms: 12 + -12 = 0
0 + 5x = 21 + -12
5x = 21 + -12

Combine like terms: 21 + -12 = 9
5x = 9

Divide each side by '5'.
x = 1.8

Simplifying
x = 1.8

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