What will come in place of the question mark (?) in the following equation, if '+' and '-' are interchanged and 'x' and '÷' are interchanged? 79÷7 + 464 x 4 - 386 =?
823
The problem requires solving the equation by interchanging the symbols '+' and '-', and 'x' and '÷'. Let's first replace the symbols:
- The equation given is: \(79 \div 7 + 464 \times 4 - 386\)
- Convert with symbol replacements: '+' with '-', '-' with '+', 'x' with '÷', and '÷' with 'x'.
Rewriting the equation after symbol interchange, we get:
- \(79 \times 7 - 464 \div 4 + 386\)
Now, we'll solve this step-by-step:
- \(79 \times 7\):
\(79 \times 7 = 553\) - \(464 \div 4\):
\(464 \div 4 = 116\)
Substitute these results back into the equation:
- \(553 - 116 + 386\)
Calculate the final expression:
- First, calculate \(553 - 116\):
- \(553 - 116 = 437\)
- Then, compute \(437 + 386\):
- \(437 + 386 = 823\)
Therefore, the correct answer is 823.
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(3, 7, 58)
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Identify the number which is different from the other.
