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Q.

Set up equations and solve them to find the unknown numbers in the following: Add 4 to eight times a number and  you get 60.

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a

8

b

6

c

7

d

5 

answer is C.

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Detailed Solution

Let the number be a
According to the question
  So,   4+8α=60
    ⇒ 8α=56
   ⇒ α=7
 
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Set up equations and solve them to find the unknown numbers in the following: Add 4 to eight times a number and  you get 60.