a number when divided by 4 is reduced by 21? what is number
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Answer:
Let x be the number.
If a number is divided by the 4 the expression becomes
4
x
If a number, when divided by 4, is reduced by 21, then the equation is
4
x
=x−21
⇒
4
x
−x=−21
⇒
4
x−4x
=−21
⇒−3x=−21×4
⇒x=
3
21
×4=7×4=28
∴,the number is 28
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