15+3h=21+h

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Solution for 15+3h=21+h equation:


Simplifying
15 + 3h = 21 + h

Solving
15 + 3h = 21 + h

Solving for variable 'h'.

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

Add '-1h' to each side of the equation.
15 + 3h + -1h = 21 + h + -1h

Combine like terms: 3h + -1h = 2h
15 + 2h = 21 + h + -1h

Combine like terms: h + -1h = 0
15 + 2h = 21 + 0
15 + 2h = 21

Add '-15' to each side of the equation.
15 + -15 + 2h = 21 + -15

Combine like terms: 15 + -15 = 0
0 + 2h = 21 + -15
2h = 21 + -15

Combine like terms: 21 + -15 = 6
2h = 6

Divide each side by '2'.
h = 3

Simplifying
h = 3

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