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0.3x=1+0.2
Add 0.2 to both sides.
0.3x=1.2
Add 1 and 0.2 to get 1.2.
x=\frac{1.2}{0.3}
Divide both sides by 0.3.
x=\frac{12}{3}
Expand \frac{1.2}{0.3} by multiplying both numerator and the denominator by 10.
x=4
Divide 12 by 3 to get 4.