Evaluate the following numerical expression (6+ 3) ÷ (4 - 5) =

Mathematics

1 answer:

Dvinal [7]3 years ago

5 0

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Because you do what’s in parentheses first which is (6+3)

You get the answer 9

Then you do 4-5 which will lead to going into negative numbers and the answer will be -1

So 9/-1 or Nine divided by negative one

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3 years ago

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If you start with a number, add 5, then multiply by 7, the result is 133. what was the original number

sergeinik [125]

The original number was: " 14 " .

____________________________________
a + 5 = b ;

b * 7 = 133 .
______________________________________________
What is: "a" ?
______________________________________________
133 / 7 = 19 = b ;

a + 5 = b = 19 ;

a + 5 = 19 ;

Subtract "5" from each side of the equation;
to isolate "a" on one side of the equation; and to solve for "a" ;
_______________________________________________
    a + 5 − 5 = 19 − 5 ;

to get:
________________________________________________
             a = 14 .
________________________________________________
Let us check our answer:

Start with "14" ;

Add "5" :   "14 + 5 = 19 " .
______________________
then multiply by "7" : "19 * 7"
__________________________
and the result is: 133 ?
__________________________
   19 * 7 = ? 133 ? Yes!
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