3x-15=21-5x

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Solution for 3x-15=21-5x equation:


Simplifying
3x + -15 = 21 + -5x

Reorder the terms:
-15 + 3x = 21 + -5x

Solving
-15 + 3x = 21 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
-15 + 3x + 5x = 21 + -5x + 5x

Combine like terms: 3x + 5x = 8x
-15 + 8x = 21 + -5x + 5x

Combine like terms: -5x + 5x = 0
-15 + 8x = 21 + 0
-15 + 8x = 21

Add '15' to each side of the equation.
-15 + 15 + 8x = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 8x = 21 + 15
8x = 21 + 15

Combine like terms: 21 + 15 = 36
8x = 36

Divide each side by '8'.
x = 4.5

Simplifying
x = 4.5

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