Find out the two signs to be interchanged for making following equation correct :5 + 3 x 8 - 12 &div

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Problem-Solving By Substitution

Interchange Of Signs And Numbers

A. + and -

B. - and ÷

C. + and x

D. + and ÷

E. None of the above

Answer: B. - and ÷

On interchanging - and ÷,
we get the equation as
5 + 3 x 8 ÷ 12 - 4 = 3
or 5 + 3 x 2/3 - 4 = 3
or 3 = 3, which is true.

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