Solve for x
x=9
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0.5x=4.2+0.3
Add 0.3 to both sides.
0.5x=4.5
Add 4.2 and 0.3 to get 4.5.
x=\frac{4.5}{0.5}
Divide both sides by 0.5.
x=\frac{45}{5}
Expand \frac{4.5}{0.5} by multiplying both numerator and the denominator by 10.
x=9
Divide 45 by 5 to get 9.
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