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Mrrafil [7]
2 years ago
5

What is the value of x in the equation, 70 = 12 + 9x – 2(x + 6)

Mathematics
2 answers:
lesantik [10]2 years ago
6 0
<h3>Solution :-</h3>

➩ 70 = 12 + 9x - 2 ( x + 6 )

➩ 70 = 12 + 9x - 2x - 12

➩ 70 = 0 + 7x

➩ 70 = 7x

Here we can use 2 methods

Methods :-

  1. Trial and error method :- By adding,subtracting , multiplying or dividing the same variable or constant on LHS & RHS
  2. Transposing :- by transposing a term from LHS to RHS or RHS to LHS

• Trial and error

By dividing with 7 on both sides

➩ 70/7 = 7x/7

➩ x = 10

• Transposing

By transposing 7 from RHS. to LHS

➩ 70/7 = x

➩ x = 10

Hence , x = 10

sergiy2304 [10]2 years ago
4 0

Answer:

x = 10

Step-by-step explanation:

In this question, we would be solving for the x-variable.

Solve:

70 = 12 + 9x - 2(x + 6)

Use the "distributive property":

70 = 12 + 9x - 2x - 12

Combine like terms:

70 = 12 + 7x - 12

70 = 7x

Divide both sides by 7 to get the variable "x" by itself:

10 = x

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Sunny_sXe [5.5K]
Hello DestinyKiara99 o/
We can solve this equation using the quadratic formula
Check it out...

x² + 6x - 24 = 0       

Δ = 6² - 4.1.(-24)
Δ = 36 + 96
Δ = 132

x = -6 +/- √132    x' = -3 + √33
<span>      --------------   /
              2          \ 
                            x'' = - 3 - </span>√33
The correct answer is the letter D
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8 0
3 years ago
Sinplify this expression -3(10x+4y)+6(6x-2y)
ad-work [718]

Answer:

6x-24y

Step-by-step explanation:

Step 1: -30x-12y+36x-12y

Distribute-3 to 10x and 4y

Then distribute 6 to 6x and -2y

Step 2: 6x-24y

After that add up like terms

3 0
3 years ago
In a shipment of airplane parts, 5% are known to be defective. If 21 parts are found to be defective, how many parts are in the
horrorfan [7]

We can use ratios and the cross-multiply-divide to find this.



The ratio 21:5 is avaliable via the question. We then need to compare that to the ratio x:100, the 100 being the percent and the x being the number of airplane parts.



21/5 = x/100



We can then solve for x to find the number of airplane parts. First we multiply by 100 on both sides to get 2100/5 = x. Therefore x = 420 and there are 420 airplane parts.

7 0
3 years ago
Find the exact value of csc theta if tan theta = sqrt3 and the terminal side of theta is in Quadrant III.
WARRIOR [948]

Answer:

3rd option

Step-by-step explanation:

Using the identities

cot x = \frac{1}{tanx}

csc² x = 1 + cot² x

Given

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csc²θ = 1 + (\frac{1}{\sqrt{3} } )² = 1 + \frac{1}{3} = \frac{4}{3}

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Since θ is in 3rd quadrant, then cscθ < 0

cscθ = - \frac{2}{\sqrt{3} } × \frac{\sqrt{3} }{\sqrt{3} } = - \frac{2\sqrt{3} }{3}

8 0
3 years ago
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poizon [28]

Answer:

Step-by-step explanation:

I believe it's 9 to the west

3 0
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