8+(20+x)=15

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Solution for 8+(20+x)=15 equation: 


Simplifying
8 + (20 + x) = 15

Remove parenthesis around (20 + x)
8 + 20 + x = 15

Combine like terms: 8 + 20 = 28
28 + x = 15

Solving
28 + x = 15

Solving for variable 'x'.

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

Add '-28' to each side of the equation.
28 + -28 + x = 15 + -28

Combine like terms: 28 + -28 = 0
0 + x = 15 + -28
x = 15 + -28

Combine like terms: 15 + -28 = -13
x = -13

Simplifying
x = -13

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