Solve for x
x=21
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4000\times 5x=4200\times 100
Multiply both sides by 100.
20000x=4200\times 100
Multiply 4000 and 5 to get 20000.
20000x=420000
Multiply 4200 and 100 to get 420000.
x=\frac{420000}{20000}
Divide both sides by 20000.
x=21
Divide 420000 by 20000 to get 21.
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