-15=8+X

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Solution for -15=8+X equation: 


Simplifying
-15 = 8 + X

Solving
-15 = 8 + 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.
-15 + -1X = 8 + X + -1X

Combine like terms: X + -1X = 0
-15 + -1X = 8 + 0
-15 + -1X = 8

Add '15' to each side of the equation.
-15 + 15 + -1X = 8 + 15

Combine like terms: -15 + 15 = 0
0 + -1X = 8 + 15
-1X = 8 + 15

Combine like terms: 8 + 15 = 23
-1X = 23

Divide each side by '-1'.
X = -23

Simplifying
X = -23

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