Final answer to the problem
$-10\sqrt{7}$
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1
Combining like terms $-3\sqrt{7}$ and $-8\sqrt{7}$
$-11\sqrt{7}+\sqrt{7}$
2
Combining like terms $-11\sqrt{7}$ and $\sqrt{7}$
$-10\sqrt{7}$
Final answer to the problem
$-10\sqrt{7}$
Exact Numeric Answer
$-26.457513$
