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klemol [59]
3 years ago
13

If you can multiply a number by 3 and then subtract 5,you will get 40.What is the number?

Mathematics
2 answers:
Tema [17]3 years ago
7 0

Let "a number" = x

3x - 5 = 40 is the equation you will use.

Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, add 5 to both sides

3x - 5 (+5) = 40 (+5)

3x = 40 + 5

3x = 45

Next, to isolate the x, divide 3 from both sides

(3x)/3 = (45)/3

x = 45/3

x = 15

15 is your answer

~

mylen [45]3 years ago
6 0

The number is 15.

40+5 = 45

45/3 = 15


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