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Which two signs should be interchanged to make the below equation mathematically correct?
4 + 8 ÷ 16 x 13 - 7 = 8
  • a)
    - and +
  • b)
    x and ÷
  • c)
    + and x
  • d)
    ÷ and -
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which two signs should be interchanged to make the below equation math...
Explanation:

Given equation:
4 + 8 ÷ 16 x 13 - 7 = 8

Interchanging + and x:
4 - 8 ÷ 16 + 13 x 7 = 8

Solving the equation:
4 - 0.5 + 91 = 8
4 + 91 - 0.5 = 8
95 - 0.5 = 8
94.5 = 8 (Not equal)

Interchanging + and ÷:
4 - 8 + 16 x 13 ÷ 7 = 8

Solving the equation:
4 - 8 + 186 ÷ 7 = 8
4 - 8 + 26.57 = 8
-4 + 26.57 = 8
22.57 = 8 (Not equal)

Interchanging ÷ and -:
4 + 8 x 16 ÷ 13 - 7 = 8

Solving the equation:
4 + 128 ÷ 13 - 7 = 8
4 + 9.85 - 7 = 8
13.85 - 7 = 8
6.85 = 8 (Not equal)

Interchanging + and x:
4 ÷ 8 + 16 x 13 - 7 = 8

Solving the equation:
0.5 + 208 - 7 = 8
0.5 + 201 = 8
201.5 = 8 (Not equal)

Interchanging + and x:
4 ÷ 8 - 16 + 13 x 7 = 8

Solving the equation:
0.5 - 16 + 91 = 8
-15.5 + 91 = 8
75.5 = 8 (Not equal)
Therefore, interchanging the signs + and x makes the equation mathematically correct.
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Which two signs should be interchanged to make the below equation mathematically correct?4 + 8 ÷ 16 x 13 - 7 = 8a)- and +b)x and ÷c)+ and xd)÷ and -Correct answer is option 'C'. Can you explain this answer?
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