8x-15=5x-21

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Solution for 8x-15=5x-21 equation:


Simplifying
8x + -15 = 5x + -21

Reorder the terms:
-15 + 8x = 5x + -21

Reorder the terms:
-15 + 8x = -21 + 5x

Solving
-15 + 8x = -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 + 8x + -5x = -21 + 5x + -5x

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

Combine like terms: 5x + -5x = 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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