Solve for y
y=1.4
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9y-2.1-5y=3.5
Subtract 5y from both sides.
4y-2.1=3.5
Combine 9y and -5y to get 4y.
4y=3.5+2.1
Add 2.1 to both sides.
4y=5.6
Add 3.5 and 2.1 to get 5.6.
y=\frac{5.6}{4}
Divide both sides by 4.
y=\frac{56}{40}
Expand \frac{5.6}{4} by multiplying both numerator and the denominator by 10.
y=\frac{7}{5}
Reduce the fraction \frac{56}{40} to lowest terms by extracting and canceling out 8.
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