2*9+h=20

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Solution for 2*9+h=20 equation: 


Simplifying
2 * 9 + h = 20

Multiply 2 * 9
18 + h = 20

Solving
18 + h = 20

Solving for variable 'h'.

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

Add '-18' to each side of the equation.
18 + -18 + h = 20 + -18

Combine like terms: 18 + -18 = 0
0 + h = 20 + -18
h = 20 + -18

Combine like terms: 20 + -18 = 2
h = 2

Simplifying
h = 2

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