Solve for y
y=\frac{42}{83}\approx 0.506024096
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8.3y=4.2
Combine 9y and -0.7y to get 8.3y.
y=\frac{4.2}{8.3}
Divide both sides by 8.3.
y=\frac{42}{83}
Expand \frac{4.2}{8.3} by multiplying both numerator and the denominator by 10.
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