6+15=5+X+8

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Solution for 6+15=5+X+8 equation:


Simplifying
6 + 15 = 5 + X + 8

Combine like terms: 6 + 15 = 21
21 = 5 + X + 8

Reorder the terms:
21 = 5 + 8 + X

Combine like terms: 5 + 8 = 13
21 = 13 + X

Solving
21 = 13 + 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.
21 + -1X = 13 + X + -1X

Combine like terms: X + -1X = 0
21 + -1X = 13 + 0
21 + -1X = 13

Add '-21' to each side of the equation.
21 + -21 + -1X = 13 + -21

Combine like terms: 21 + -21 = 0
0 + -1X = 13 + -21
-1X = 13 + -21

Combine like terms: 13 + -21 = -8
-1X = -8

Divide each side by '-1'.
X = 8

Simplifying
X = 8

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