Solve for b
b=10
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0.4b=2+2
Add 2 to both sides.
0.4b=4
Add 2 and 2 to get 4.
b=\frac{4}{0.4}
Divide both sides by 0.4.
b=\frac{40}{4}
Expand \frac{4}{0.4} by multiplying both numerator and the denominator by 10.
b=10
Divide 40 by 4 to get 10.
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