Solve for x
x=100
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8=0.08x
Multiply 4 and 2 to get 8.
0.08x=8
Swap sides so that all variable terms are on the left hand side.
x=\frac{8}{0.08}
Divide both sides by 0.08.
x=\frac{800}{8}
Expand \frac{8}{0.08} by multiplying both numerator and the denominator by 100.
x=100
Divide 800 by 8 to get 100.
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