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Rom4ik [11]
3 years ago
13

If 2x – 3 + 3x = – 28, what is the value of x?

Mathematics
2 answers:
Goryan [66]3 years ago
8 0
-2x-3+3x=-28
x-3=-28
x=-25
siniylev [52]3 years ago
5 0
2x - 3 +3x = -28

 combine like terms

5x-3 = -28

add 3 to each side

5x = -25

divide both sides by 5

x = -25 / 5 = -5
x=-5
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10x + 3y = 19<br> y = 2x + 5
sleet_krkn [62]

Answer:

x = 1/4

y = 5 2/4

Step-by-step explanation:

Given two equations

1. 10x + 3y = 19

2. y = 2x + 5

Substitute 2x + 5 for y in the first equation

We have

10x + 3y = 19

10x + 3(2x + 5) = 19

Expand the bracket

10x + 3 X 2x + 3 X 5 = 19

10x + 6x + 15 = 19

16x + 15 = 19

Subtract 15 from both sides to eliminate 15 on the left

16x + 15 - 15 = 19 - 15

16x = 4

Divide both sides by 16 to isolate x

16x/16 = 4/16

x = 1/4

Now, substitute 1/4 for x in either equation to get y.

Using equation 2 , we have

y = 2x + 5

= 2(1/4) + 5

= 2/4 + 5

LCM of the denominator is 4.

Divide the LCM by the denominators and multiply the results by the numerators. Also, the LCM becomes the denominator of the results

Therefore

= 2 + 20/4

= 22/4

y= 5 2/4

x = 1/4 , y = 5 2/4

6 0
3 years ago
BD is parellel to XY, what is the value of x
chubhunter [2.5K]
Well X should have the same value as B, but more information would be needed if you're looking for a more specific answer.
7 0
3 years ago
HELP i’m confused (volume)
zimovet [89]
Vas happenin!

2,160 cm ^3

Hope this helps


-Zayn Malik
8 0
3 years ago
103^2-102^2=_____×(103-102)=_____<br>pls help me...this is in factorization ​
Ray Of Light [21]

103^2-102^2  

The property that applies here is a^2-b^2 = (a+b)(a-b)

so the answer is 103^2-102^2=(102+103)*(103-102)= numerically it is 205( as 103+102 = 205 and 103-102 = 1.....so 205*1 = 205)

The thing is that usually the factorization ends at (102+103)(102-103) ......

8 0
4 years ago
Read 2 more answers
​Quadrilateral ABCD​ is inscribed in this circle.
murzikaleks [220]

Answer:

C = 80

Step-by-step explanation:

A cyclic quadrilateral is one where all 4 vertices touch the circumference of a circle.

It has 1 interesting property that should concern you: <B + <D = 180 degrees.

3x - 59 + 2x - 1 = 180          Combine like terms

5x - 60  = 180                     Add 60 to both sides.

5x = 180 + 60

5x = 240

x = 240/5

x = 48

Now go to 2x + 4.

x = 48

A = 2*48 + 4

A = 96 + 4

A = 100

So C = 180 - 100

C = 80

7 0
3 years ago
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