6x+15=3x+21

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Solution for 6x+15=3x+21 equation:


Simplifying
6x + 15 = 3x + 21

Reorder the terms:
15 + 6x = 3x + 21

Reorder the terms:
15 + 6x = 21 + 3x

Solving
15 + 6x = 21 + 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.
15 + 6x + -3x = 21 + 3x + -3x

Combine like terms: 6x + -3x = 3x
15 + 3x = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 + 3x = 21 + 0
15 + 3x = 21

Add '-15' to each side of the equation.
15 + -15 + 3x = 21 + -15

Combine like terms: 15 + -15 = 0
0 + 3x = 21 + -15
3x = 21 + -15

Combine like terms: 21 + -15 = 6
3x = 6

Divide each side by '3'.
x = 2

Simplifying
x = 2

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