Solve for x
x=336
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21\times 400=25x
Multiply both sides of the equation by 525, the least common multiple of 25,21.
8400=25x
Multiply 21 and 400 to get 8400.
25x=8400
Swap sides so that all variable terms are on the left hand side.
x=\frac{8400}{25}
Divide both sides by 25.
x=336
Divide 8400 by 25 to get 336.
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