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Marat540 [252]
2 years ago
10

Which of the following is an algebraic expression that represents the phrase X increased by 20

Mathematics
1 answer:
iren2701 [21]2 years ago
5 0

Answer:

The expression means that X+20

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Find a number which decreased by 12 equals 3 times it’s opposite
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Answer:

The number is 3.

Step-by-step explanation:

To find : A number which decreased by 12 equals 3 times it’s opposite ?

Solution :

Let the number be 'x'.

It's opposite is '-x'.

A number which decreased by 12 equals 3 times it’s opposite

i.e. x - 12 = 3(-x)

Solving the equation,

x-12=-3x

x+3x=12

4x=12

x=\frac{12}{4}

x=3

Therefore, the number is 3.

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