Question

#Brainly Teaser

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Answer 1

Answer:

43

Step-by-step explanation:

(5-2)(5+7)

25+35-10-14

60-24

38

No. to be added=5

Therefore,

38+5=43

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Answer 2

$\huge\textbf\red{Answer:-}$

First subtract 5 by 2 and then add five by 7 and substitute the value

calculating:

$(5 - 2) = 3$

$(5 + 7) = 12$

Using the properties we find

$(- )\times ( +) = ( -) \\ ( + ) \times (+ ) = ( +) \\ ( + ) \times ( - ) = ( - ) \\ ( - ) \times ( - ) = ( + )$

Here we use the property

$( - ) \times ( + ) = ( - ) \\ or \\ ( + ) \times ( - ) = ( - )$

$(5 - 2) = 3 \\ (5 + 7) = 12 \\ ( + 12) + ( - 3) = ( - 12)$

We get -12

Substituting value 5

(-12)-(5)

=-12

Normal addition and subtraction we get amswer

$(5 - 2) = 3$

$(5 + 7) = 12$

$=15$