2x+15=8x+21

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Solution for 2x+15=8x+21 equation:


Simplifying
2x + 15 = 8x + 21

Reorder the terms:
15 + 2x = 8x + 21

Reorder the terms:
15 + 2x = 21 + 8x

Solving
15 + 2x = 21 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
15 + 2x + -8x = 21 + 8x + -8x

Combine like terms: 2x + -8x = -6x
15 + -6x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
15 + -6x = 21 + 0
15 + -6x = 21

Add '-15' to each side of the equation.
15 + -15 + -6x = 21 + -15

Combine like terms: 15 + -15 = 0
0 + -6x = 21 + -15
-6x = 21 + -15

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

Divide each side by '-6'.
x = -1

Simplifying
x = -1

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