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Jlenok [28]
3 years ago
15

3 (5x + 7) = 75 what is x?

Mathematics
2 answers:
garik1379 [7]3 years ago
8 0

Answer:

3 (5x+7) = 75

15x + 21 = 75

15x + 21 - 21 = 75 - 21

15x = 54

x = 3.6

Step-by-step explanation:

Elodia [21]3 years ago
3 0

Answer:

x = 3.6

Step-by-step explanation:

divide both sides by 3

5 x + 7 = 25

subtract 7 from both sides

5 x = 18

divide both sides by 5

x = 3.6

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Just add those 2 amounts together

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Which fraction is less 2/9 1/3
dedylja [7]

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4 0
3 years ago
3[-x + (2 x + 1)] = x - 1<br><br><br> what is x
Nataly_w [17]

The answer you are looking for is x=-2.

Solution/Explanation:

Writing out the equation

3[-x+(2x+1)]=x-1

Simplifying inside of the brackets first

Combining like terms, since -x+2x=x

3(x+1)=x-1

*You can remove the parenthesis, if preferred.

Using the Distributive Property on the left side of the equation

3x+3=x-1

Now, subtracting the "x" variable from both sides

3x+3-x=x-x-1

"x-x" cancels out to 0.

3x+3-x=-1

Combining like terms and simplifying

3x-x+3=-1

2x+3=-1

Subtracting 3 from both sides of the equation

2x+3-3=-1-3

"3-3" cancels out to zero.

2x+0=-1-3

2x=-1-3

Simplifying the right side of the equation

2x=-4

Finally, dividing both sides by 2

2x/2=-4/2

Simplifying the final part of the problem

Since 2x/2=x and -4/2=-2

x=-2

So, therefore, the final answer is x=-2.

Hope that this has helped you. Good day to you.

4 0
2 years ago
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