To solve the equation \(-0.1 + 1.7y = 0.9\), follow these steps:
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Isolate the term with \(y\) by adding \(0.1\) to both sides:
\[ 1.7y = 0.9 + 0.1 \]
\[ 1.7y = 1.0 \]
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Solve for \(y\) by dividing both sides by \(1.7\):
\[ y = \frac{1.0}{1.7} \]
\[ y \approx 0.5882 \]
Therefore, the solution is:
\[ y \approx 0.5882 \]