12 is subtracted from a number and the difference is multiplied by 4, the result is 5. What is the number
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Answer:
i think it's help you
Step-by-step explanation:
Let x be the number,
So, according to question
⇒(x−
2
1
)4=5
⇒4x−
2
4
=5
⇒
2
2×4x−4
=5
⇒8x−4=10
⇒8x=10+4
⇒8x=14
⇒x=
8
14
=
4
7
Hence, x=
4
7
is the number.
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