9O-77=21

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Solution for 9O-77=21 equation: 


Simplifying
9O + -77 = 21

Reorder the terms:
-77 + 9O = 21

Solving
-77 + 9O = 21

Solving for variable 'O'.

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

Add '77' to each side of the equation.
-77 + 77 + 9O = 21 + 77

Combine like terms: -77 + 77 = 0
0 + 9O = 21 + 77
9O = 21 + 77

Combine like terms: 21 + 77 = 98
9O = 98

Divide each side by '9'.
O = 10.88888889

Simplifying
O = 10.88888889

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