3x-8=x+9

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Solution for 3x-8=x+9 equation:


Simplifying
3x + -8 = x + 9

Reorder the terms:
-8 + 3x = x + 9

Reorder the terms:
-8 + 3x = 9 + x

Solving
-8 + 3x = 9 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-8 + 3x + -1x = 9 + x + -1x

Combine like terms: 3x + -1x = 2x
-8 + 2x = 9 + x + -1x

Combine like terms: x + -1x = 0
-8 + 2x = 9 + 0
-8 + 2x = 9

Add '8' to each side of the equation.
-8 + 8 + 2x = 9 + 8

Combine like terms: -8 + 8 = 0
0 + 2x = 9 + 8
2x = 9 + 8

Combine like terms: 9 + 8 = 17
2x = 17

Divide each side by '2'.
x = 8.5

Simplifying
x = 8.5

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