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aev [14]
3 years ago
8

Jubal wrote the four equations below. He examined them, without solving them, to determine which equation has no solution.

Mathematics
2 answers:
madreJ [45]3 years ago
5 0

Answer:

3x+2=3x-2

Step-by-step explanation:

The second equation has no solution, because is not true

so

3x+2=3x-2 ------> is not true

therefore

The equation has no solutions

Ilya [14]3 years ago
4 0

Answer:

3x+2=3x-2

Step-by-step explanation:

When an equation has no solution there's no true value for x. What we have is a Contradiction, a false answer.

1)The first and the last equation has a true solution in the form:

0x=0

True

2)The third one has a solution:

x=7

True

3) The second one

3x+2=3x-2\\0x=-4

FALSE

A Contradiction. Then, this one has no solution.

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Jimmy was supposed to multiply a certain number by 43 but by mistake he multiplied that number by 34 as a result his answer was
vredina [299]

Answer:

345

Step-by-step explanation:

We can solve this problem by two equations. Our variables will be the following:

x is the amount to be multiplied

and y is the amount that should be obtained by multiplying by 43

Thus our <u>first equation</u> is:

43x=y

But the problem tells us that there was an error and the number x was multiplied by 34, so the result failed by 3105, thus the <u>second equation</u> is as follows:

34x=y-3105

By multiplying the quantity by 34, an amount is obtained that differs from 3105 from what it would have been obtained if multiplied by 43.

Now we are going to <u>replace the first equation in the second one </u>(y=43x):

34x=43x-3105

And clear to find x:

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The number that jimmy was supposed to multiply by 43 is 345.

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