Solve for x
x=0.4
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3x=0.9+0.3
Add 0.3 to both sides.
3x=1.2
Add 0.9 and 0.3 to get 1.2.
x=\frac{1.2}{3}
Divide both sides by 3.
x=\frac{12}{30}
Expand \frac{1.2}{3} by multiplying both numerator and the denominator by 10.
x=\frac{2}{5}
Reduce the fraction \frac{12}{30} to lowest terms by extracting and canceling out 6.
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