Solve for x
x=1.2
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3+0.8+x=\frac{20}{4}
Divide both sides by 4.
3+0.8+x=5
Divide 20 by 4 to get 5.
3.8+x=5
Add 3 and 0.8 to get 3.8.
x=5-3.8
Subtract 3.8 from both sides.
x=1.2
Subtract 3.8 from 5 to get 1.2.
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