27-x=30

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Solution for 27-x=30 equation: 


Simplifying
27 + -1x = 30

Solving
27 + -1x = 30

Solving for variable 'x'.

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

Add '-27' to each side of the equation.
27 + -27 + -1x = 30 + -27

Combine like terms: 27 + -27 = 0
0 + -1x = 30 + -27
-1x = 30 + -27

Combine like terms: 30 + -27 = 3
-1x = 3

Divide each side by '-1'.
x = -3

Simplifying
x = -3

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