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ki77a [65]
3 years ago
5

What is the value of x in the equation 8x-2y=48, when y=4

Mathematics
2 answers:
Oksanka [162]3 years ago
8 0
8x - 2y = 48,  y =4

8x - 2(4) = 48
8x - 8 = 48
8x = 48+8
8x  = 56
x = 56/8 = 7

x = 7
Luden [163]3 years ago
8 0
8x - 2y = 48 equals x = 7.

First, 
make sure to add in your 4 in replace of the y. Multiply 2 x 4 to get 8. Your problem should look like: 8x - 8 = 48.
Second, add 8 to both sides. Your problem should look like: 8x = 48 + 8.
Third, add 48 + 8 to get 56. Your problem should look like: 8x = 56.
Fourth, divide both sides by 8. Your problem should look like: x = \frac{56}{8}.
Fifth,simplify \frac{56}{8} to get 7. Your problem should look like: x = 7, which is your answer.
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6 0
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Hunter-Best [27]
-41 would be the solution.
4 0
3 years ago
Help me please cause i dont understand i really need this question right know ill give you 20 points if you help me
JulijaS [17]

Step-by-step explanation:

Basically 15x<30 is saying that 15x is less that 30. So that means x can be any number as long as when multiplied to 15 it has to be less then 30. So they only number available is 1. So 15(1)<30. Im not sure what the question is but X=1

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Which property is used to solve the following problem: 8(7-3)
Shtirlitz [24]

Answer:

D) Distributive property

Step-by-step explanation:

We use distributive property because the 8 is distributed to the 7 and the negative three (it is negative because the expression can also be written as 8(7 + -3). This is how it will look after the distributing:

56 + -24

7 0
3 years ago
5. solve for x
miss Akunina [59]

Answer:

x = 17, MN = 11

Step-by-step explanation:

Given 2 secants from an external point to a circle, then

The product of the external part and the whole of one secant is equal to the product of the external part and the whole of the other secant.

(5)

7(7 + x) = 8(8 + 13) = 8 × 21 = 168 ( divide both sides by 7 )

7 + x = 24 ( subtract 7 from both sides )

x = 17

(6)

9(9 + 2x - 7) = 10(10 + 8)

9(2x + 2) = 10 × 18 = 180 ( divide both sides by 9 )

2x + 2 = 20 ( subtract 2 from both sides )

2x = 18 ( divide both sides by 2 )

x = 9

Then

MN = 2x - 7 = 2(9) - 7 = 18 - 7 = 11

7 0
2 years ago
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