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80=-100+10sqrtx
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Solve 80 = −100 + 10√x.
Add 100 to both sides: 180 = 10√x.
Divide by 10: √x = 18.
Square both sides (√x ≥ 0 so this is valid): x = 18^2 = 324.
Check: √324 = 18 → −100 + 10·18 = 80.
Answer: x = 324.
Add 100 to both sides: 180 = 10√x.
Divide by 10: √x = 18.
Square both sides (√x ≥ 0 so this is valid): x = 18^2 = 324.
Check: √324 = 18 → −100 + 10·18 = 80.
Answer: x = 324.
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