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Dmitry [639]
3 years ago
5

Chelsea shows her work in finding the solution to 4x-5=2+3(x-3). After checking her answer in the original equation, she found t

hat it did not work. Where did she make a mistake?
Mathematics
2 answers:
harina [27]3 years ago
4 0

Answer: x = -2, it could be they didnt follow the right order of mathematic operation (BODMAS)

Step-by-step explanation:

4x-5 = 2+3(x-3)

following the order of operation we must open the bracket first

4x - 5 = 2 + 3x - 9

4x - 5 = 3x - 7

we now collect like terms

4x - 3x = -7 + 5

x= -2

Now checking the answer in the original equation, we will just put -2 wherever x is.

4x - 5 = 2 + 3(x-3)

4(-2) - 5 = 2 + 3( -2 -3)

We will have to deal with the bracket first before we proceed;

-8-5 = 2 + 3(-5)

-13 = 2 - 15

-13 = -13

KonstantinChe [14]3 years ago
3 0

Answer:

The solution is x=-2

The mistake could be in operation however here is the all operation

Step-by-step explanation:

Getting each term and sum each one

4x-5=2+3(x-3)\\4x-5=2+3x-9\\4x-5=-7+3x\\4x-3x=-7+5\\x=-2

Check replacing in the original equation:

4(-2)-5=2+3(-2-3)\\-8-5=2-6-9\\-13=2-15\\-13=13

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Answer:

The volume of the new crate is exactly 174.4% of the old crate.

Step-by-step explanation:

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The volume of a rectangular prism of dimensions x, y and z is given by:

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She decided that the dimensions of the new crate needs to be increased by 40% of the original length.

Each dimension is increased by 40%, which means that each is multiplied by 1 + 0.4 = 1.4. So

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Percentage:

The new volume is 2.744 the original volume. Considering the original volume is 100% = 1, it increased by 2.744 - 1 = 1.744 = 1.744*100% = 174.4%.

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7 0
2 years ago
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Nina [5.8K]
X + y = 85
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x = 85 - y 
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<span>170 - 2y + 4y = 218 </span>
<span>170 + 2y = 218 </span>
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