-9=15-3x

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Solution for -9=15-3x equation:


Simplifying
-9 = 15 + -3x

Solving
-9 = 15 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
-9 + 3x = 15 + -3x + 3x

Combine like terms: -3x + 3x = 0
-9 + 3x = 15 + 0
-9 + 3x = 15

Add '9' to each side of the equation.
-9 + 9 + 3x = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 3x = 15 + 9
3x = 15 + 9

Combine like terms: 15 + 9 = 24
3x = 24

Divide each side by '3'.
x = 8

Simplifying
x = 8

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