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3 years ago

If three times a number added to 8 is divided by the number plus 7, the result is four thirds. Find the number.

Mathematics

1 answer:

Marina86 [1]3 years ago

5 0

9514 1404 393

Answer:

4/5

Step-by-step explanation:

The wording is ambiguous, as it often is when math expressions are described in English. We assume you intend ...

$\dfrac{3n+8}{n+7}=\dfrac{4}{3}\\\\3(3n+8)=4(n+7)\qquad\text{multiply by $3(n+7)$}\\\\9n+24=4n+28\qquad\text{eliminate parentheses}\\\\5n=4\qquad\text{subtract $4n+24$}\\\\\boxed{n=\dfrac{4}{5}}\qquad\text{divide by 5}$

The number is 4/5.

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Goshia [24]

Answer:

135 + 100h = 535

Step-by-step explanation:

to solve it would be 535-135= 400

then 400/100=4

135h + 100 = 535 no

135 - 100h = 535 no

135 + 100h =535 yes

135 + 100 = 535 no

For the one that is correct it would go like this

So h is the amount of hours which we do know but want to check

135 + 100h = 535

-135 -135

100h = 400

/100 /100

h = 4

And h is hours which we also got 4

so it would be 135 + 100h = 535

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3 years ago

If three times a number added to 8 is divided by the number plus 7, the result is four thirds. Find the number.​

If three times a number added to 8 is divided by the number plus 7, the result is four thirds. Find the number.