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yarga [219]
2 years ago
12

What is the value of x? Enter your answer in the box.

Mathematics
1 answer:
Law Incorporation [45]2 years ago
7 0

Answer:

x=25

Step-by-step explanation:

3x-5=2x+20=4x-30

3(25)-5 = 2(25) + 20 = 4(25) - 30

75-5 = 50 + 20 = 100 - 30

70=70=70

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Elimination method<br> 4x-2y=48<br> 2x+6y=-18
yulyashka [42]
4x-2y=48\\ \\ 2x+6y=-18

First we'll multiply the second equation by -2


-2\cdot (2x+6y)=-2\cdot -18\\ \\ -4x-12y=36

Now let's add the new equation and the first one.

(4x-2y)+(-4x-12y)=48+36\\ \\ 4x-4x-2y-12y=48+36\\ \\ -14y=84\\ \\ y=\frac { 84 }{ -14 } \\ \\ y=-6

We found y's value. We'll plug it in one of the equations to find x's value.

y=-6\\ \\ 4x-2y=48\\ \\ 4x-2\cdot -6=48\\ \\ 4x+12=48\\ \\ 4x=48-12\\ \\ 4x=36\\ \\ x=\frac { 36 }{ 4 } \\ \\ x=9

Solution ;

(9, -6)


4 0
3 years ago
Read 2 more answers
4 + 3(4 - 9^0)+ 5^-3i
frutty [35]

Answer:

13.008 or 13 1/125 or 1626/125

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Troy's family is going to the beach for vacation. They plan to drive at the posted speed limit of 65 miles per hour and drive 5
Elena-2011 [213]
The answer is A) the number of miles
4 0
2 years ago
PLISS ANSWER :C DONT ANSWER IF YDK THAnKSSS<br> *also pls look at both images :)*
Iteru [2.4K]

Answer:

First image: (6, -1)

2nd image: y = 63

Explanation:

1)

2x + y = 11

1/2x - 5y = 8

y = -2x + 11

1/2x - 5(-2x + 11) = 8

1/2x + 10x - 55 = 8

10.5x - 55 = 8

10.5x = 63

x = 6

2x + y = 11

2(6) + y = 11

12 + y = 11

y = -1

(x , y) = (6, -1)

2)

1/4(8y - 4.8) = 2 (0.9y + 5.4) + 3/5

2y - 1.2 = 1.8y + 10.8 + 0.6

0.2y - 1.2 = 11.4

0.2y = 12.6

y = 63

7 0
3 years ago
What does the line 4x y = 17 look like?
olganol [36]
The equation must be 4x + y = 17

I will use the y-intercept slope version

y = - 4x + 17

Then the slope is negative (-4) and the y-intercept is 17.

The line passes through the points (0,17) and (0,17/4). The negative slope indicates that the line goes down from left to right (y decreases when x increases).
4 0
3 years ago
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