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h+(2h+15)=0
We simplify the equation to the form, which is simple to understand
h+(2h+15)=0
Remove unnecessary parentheses
+h+2h+15=0
We move all terms containing h to the left and all other terms to the right.
+1h+2h=0-15
We simplify left and right side of the equation.
+3h=-15
We divide both sides of the equation by 3 to get h.
h=-5
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