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schepotkina [342]
3 years ago
14

Solve the equation. 30- (x + 5) = 7x-7 The solution is x =

Mathematics
2 answers:
lord [1]3 years ago
7 0

Answer:

- 30(x + 5) = 7x - 7 \\  - 30x - 150 = 7x - 7 \\ 7x + 30x =  - 150 + 7 \\ 37x =  - 143 \\ x =    \frac{ - 143}{37}  \\ x =  - 3.864

________o____o_____

30–(x+5)=7x-7

30 – x–5 =7x -7

7x+x = 30-5+7

8x = 32

x= 32/8

x=4

I hope I helped you^_^

Elan Coil [88]3 years ago
3 0

X=4
30-x+5=7x-7
25-x=7x-7
-x+25=7x-7
-x=7x-32
(subtract 7x from both sides)
-8x=-32
(divide by -8) (remember negative times negative= positive)
X=4
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△ABC≅△DEF, BC=4x−12, and EF=−3x+16. Find x and EF.
kirill [66]

x = 4 and EF = 4 ⇒ 3rd answer

Step-by-step explanation:

If two triangles are congruent, then

1. Their corresponding sides are equal

2. Their corresponding angles are equal

3. Their areas and perimeters are equal

∵ △ ABC ≅ △ DEF

∴ AB ≅ DE

∴ BC ≅ EF

∴ AC ≅ DF

∵ BC = 4 x - 12

∵ EF = -3 x + 16

∵ BC = EF

∴ 4 x - 12 = -3 x + 16

Let us solve the equation to find x

∵ 4 x - 12 = -3 x + 16

- Add 3 x for both sides

∴ 7 x - 12 = 16

- Add 12 to both sides

∴ 7 x = 28

- Divide both sides by 7

∴ x = 4

Substitute the value of x in the expression of EF

∵ EF = -3 x + 16

∵ x = 4

∴ EF = -3(4) + 16 = -12 + 16

∴ EF = 4

x = 4 and EF = 4

Learn more:

You can learn more about congruence of Δs in brainly.com/question/3202836

#LearnwithBrainly

3 0
2 years ago
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Usimov [2.4K]

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2 years ago
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Solve each inequality below. Represent the solutions on number lines. 7x − 2 &lt; 3 + 2x
LekaFEV [45]
Hi, I would be glad to help you here. 

<span>7x − 2 < 3 + 2x 

Move terms 

7x - 2x - 2 < 3 

Collect the like terms

(7x - 2x) = 5x (<3 + 2 stays the same) 

Calculate 

5x (<3 + 2 = 5) 

5x <5 

Divide both sides of the inequality by (5) giving you, 

x < 1 

So, finally in a total the correct answer here is (x < 1)  

</span>
6 0
3 years ago
ILL BRAINLIEST YOU IF YOU PLEASE HELP ME
mr Goodwill [35]

Answer:

15 < x < 31

Step-by-step explanation:

Given 2 sides of a triangle then the third side x is in the range

difference of 2 sides < x < sum of 2 sides , that is

23 - 8 < x < 23 + 8

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3 0
2 years ago
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Clayton and Olivia played a computer game.Olivia final score was 2306421 and Clayton was 2302972.show these numbers on a number
Elden [556K]
(I cannot be the number line bit sorry)
When you're finding which one is greater, you can either write these out in words, or you can put them next to eachother.
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Clayton- Two million, three hundred and two thousand, nine hundred and seventy two. (2302972)

From writing them out, you can see that Olivia's score has 'three hundred and six thousands', where as, Clayton has 'three hundred and two thousand'

Therefore, Olivia got the higher score.
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