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Simplifying
h2 + (7 + h2) = 169
Remove parenthesis around (7 + h2)
h2 + 7 + h2 = 169
Reorder the terms:
7 + h2 + h2 = 169
Combine like terms: h2 + h2 = 2h2
7 + 2h2 = 169
Solving
7 + 2h2 = 169
Solving for variable 'h'.
Move all terms containing h to the left, all other terms to the right.
Add '-7' to each side of the equation.
7 + -7 + 2h2 = 169 + -7
Combine like terms: 7 + -7 = 0
0 + 2h2 = 169 + -7
2h2 = 169 + -7
Combine like terms: 169 + -7 = 162
2h2 = 162
Divide each side by '2'.
h2 = 81
Simplifying
h2 = 81
Take the square root of each side:
h = {-9, 9}
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