Solve for x
x=-20
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x=\frac{0.4}{-0.02}
Divide both sides by -0.02.
x=\frac{40}{-2}
Expand \frac{0.4}{-0.02} by multiplying both numerator and the denominator by 100.
x=-20
Divide 40 by -2 to get -20.
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