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3 years ago

What is the answer for 3(x+5)=5x+7

2 answers:

7 0

The answer is 4=X

3 times X and 5 is 3X+15=5x+7

From there you subtract 3x from both sides and end up with 15= 2x+7

And then you subtract 7 from the 15. Which is 8

Then divide the 8 by 2 which is 4

Anna35 [415]3 years ago

4 0

Answer:

4 = x

Step-by-step explanation:

First, distribute the 3 to the x and 5.

3x + 15 = 5x + 7

Now, subtract 3x from both sides and 7 from both sides.

8 = 2x

Now, divide by 2 on both sides.

4 = x

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If <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%2B3%7D%7B4%7D" id="TexFormula1" title="\frac{x+3}{4}" alt="\frac{x+3}{4}" align

AleksAgata [21]

Answer:

$f^{-1}(x) = 4x-3$ is the right answer.

Step-by-step explanation:

I the function is $f(x) = \frac{x+3}{4}$

$f(x)=\frac{1}{4}(x+3)$

Then we have to find inverse of function f(x).

we will write the equation as $y=\frac{1}{4}(x+3)$

4y = x + 3

x = 4y - 3

Now we will rewrite the function as

$f^{-1}(x) = 4x-3$

So the answer is $f^{-1}(x) = 4x-3$

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4 years ago

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yulyashka [42]

Answer:

x=29/11

Step-by-step explanation:

7(5x+12)=2x-3

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=35x-2x=-3-84

=33x=-87

then divide both side by 33

4 0

3 years ago

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Answer:

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5. Which method would be the simplest way to solve the system? 7x + 5y = 19, -7x – 2y = -16

Alla [95]

7x + 5y = 19
-7x - 2y = -16
 3y = 3
 3 3
 y = 1
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 7x = 14
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