15+3x-6+2x=21

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Solution for 15+3x-6+2x=21 equation:


Simplifying
15 + 3x + -6 + 2x = 21

Reorder the terms:
15 + -6 + 3x + 2x = 21

Combine like terms: 15 + -6 = 9
9 + 3x + 2x = 21

Combine like terms: 3x + 2x = 5x
9 + 5x = 21

Solving
9 + 5x = 21

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 5x = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 5x = 21 + -9
5x = 21 + -9

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

Divide each side by '5'.
x = 2.4

Simplifying
x = 2.4

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