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Which of the following equations is correct when the numbers 3 and 9 are interchanged and the signs - and × are interchanged?
Question

Which of the following equations is correct when the numbers 3 and 9 are interchanged and the signs - and × are interchanged?

A.

12 ÷ 9 - 2 × 7 + 3 = 10

B.

1 - 9 × 10 ÷ 4 + 3 = 32

C.

. 9 ÷ 4 × 3 + 1 - 6 = 18

D.

9 ÷ 2 × 1 - 3 + 5 = 15

Correct option is A

Given: 
Swap numbers 3 ↔ 9
Swap signs − ↔ ×
Operation preference wiseSymbolBrackets[],,()Orders, of(power),(root),ofDivision÷Multiplication×Addition+Subtraction\begin{array}{|c|c|} \hline\textbf{Operation preference wise} & \textbf{Symbol} \\\hline\text{Brackets} &[],{}, () \\ \hline \text{Orders, of} & (power), √ (root) , of \\ \hline \text{Division}& ÷ \\ \hline \text{Multiplication} & × \\ \hline \text{Addition} & + \\ \hline \text{Subtraction} & - \\\hline \end{array}
Put given number and sign in the options 
A) ​12 ÷ 9 - 2 × 7 + 3 = 10
12 ÷ 3 × 2 - 7 + 9 = 10
4 × 2 - 7 + 9 = 10
8 - 7 + 9 = 10
17 - 7  = 10
10 = 10 (Satisfied)

Thus, correct option is (a).

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