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worty [1.4K]
3 years ago
13

-4x-7-3x+4=25 How do I solve by x

Mathematics
1 answer:
Darya [45]3 years ago
4 0

Answer:

x=-4

Step-by-step explanation:

-4x-7-3x+4=25

-7x-3=25

-7x=28

x=-4

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One person is chosen from a class of students here are some possible outcome
motikmotik
I think is A and the another question is B
3 0
3 years ago
Does 15/25 x 25/15 = 0?
sergejj [24]
No, it does not equal 0. Lets multiply it out and see what it actually equals.
15/25 * 25/15
15*25 / 25*15
375 / 375
Anything over itself is 1, so the final answer for the multiplication is 1.

4 0
3 years ago
2n - 5 = 31<br><br> Answer: The value of n is ....
Romashka [77]

Answer:

n = 18

Step-by-step explanation:

2n - 5 = 31

Add 5 to each side

2n - 5+5 = 31+5

2n = 36

Divide each side by 2

2n/2 = 36/2

n = 18

7 0
3 years ago
For the past 25 days, jonathon has read for n minutes each day. His total number of minutes read is 875. Write an equation to ex
liubo4ka [24]

Answer:

Required equation is: 25n = 875

Step-by-step explanation:

Let n be the number of minutes Jonathon read per day

Now

He read for 25 days and total 875 minutes

The equation will be:

25n = 875

We can solve this equation to find the number of minutes each day

Using Division property of Equality

\frac{25n}{25} = \frac{875}{25}\\n = 35

Hence,

Required equation is: 25n = 875

6 0
3 years ago
Describe and correct the error in finding DC
sleet_krkn [62]

Answer:

DC = 2

Step-by-step explanation:

The wrong equation was used.

The right equation to use based on the midsegment theorem of a trapezoid is:

MN = ½(AB + DC)

MN = 8

AB = 14

Substitute

8 = ½(14 + DC)

Multiply both sides by 2

8*2 = ½(14 + DC)*2

2*8 = 14 + DC

16 = 14 + DC

16 - 14 = 14 + DC - 14

2 = DC

DC = 2

6 0
3 years ago
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