Solve for x
x=2
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0.42x=0.84
Combine 0.2x and 0.22x to get 0.42x.
x=\frac{0.84}{0.42}
Divide both sides by 0.42.
x=\frac{84}{42}
Expand \frac{0.84}{0.42} by multiplying both numerator and the denominator by 100.
x=2
Divide 84 by 42 to get 2.
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