o+7+o=28

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Solution for o+7+o=28 equation: 


Simplifying
o + 7 + o = 28

Reorder the terms:
7 + o + o = 28

Combine like terms: o + o = 2o
7 + 2o = 28

Solving
7 + 2o = 28

Solving for variable 'o'.

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

Add '-7' to each side of the equation.
7 + -7 + 2o = 28 + -7

Combine like terms: 7 + -7 = 0
0 + 2o = 28 + -7
2o = 28 + -7

Combine like terms: 28 + -7 = 21
2o = 21

Divide each side by '2'.
o = 10.5

Simplifying
o = 10.5

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