Solve for x
x=80
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0.4x=21+11
Add 11 to both sides.
0.4x=32
Add 21 and 11 to get 32.
x=\frac{32}{0.4}
Divide both sides by 0.4.
x=\frac{320}{4}
Expand \frac{32}{0.4} by multiplying both numerator and the denominator by 10.
x=80
Divide 320 by 4 to get 80.
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