9-20=x+28

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Solution for 9-20=x+28 equation:


Simplifying
9 + -20 = x + 28

Combine like terms: 9 + -20 = -11
-11 = x + 28

Reorder the terms:
-11 = 28 + x

Solving
-11 = 28 + 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.
-11 + -1x = 28 + x + -1x

Combine like terms: x + -1x = 0
-11 + -1x = 28 + 0
-11 + -1x = 28

Add '11' to each side of the equation.
-11 + 11 + -1x = 28 + 11

Combine like terms: -11 + 11 = 0
0 + -1x = 28 + 11
-1x = 28 + 11

Combine like terms: 28 + 11 = 39
-1x = 39

Divide each side by '-1'.
x = -39

Simplifying
x = -39

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