## bridgetolivares Group Title i dont think this is correct but solve for x, i will draw out my problem and work. 2 years ago 2 years ago

1. bridgetolivares

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2. nbouscal

What is the original problem? $$-4\sqrt{x+9}=20$$?

3. bridgetolivares

yes

4. nbouscal

Okay. You can't add 4, because it's $$-4\sqrt{x+9}$$, not $$-4+\sqrt{x+9}$$. You can divide, though, which will give you $$\sqrt{x+9}=-5$$, then square both sides to get $$x+9=25$$, so $$x=16$$.

5. bridgetolivares

ahh i see. thank you.