How do you do this problem: 8(7-y)=-24????

Question

And also how do you do this one: -4(8+5n)=8 and please show me the work. Thank you sooooo much!!!

Answer 1

8(7 - y) = -24
multiply 8 by the factors inside the parentheses.
8*7, 8*y --> 56, 8y
and that leaves you with:
56 - 8y = -24.
subtract 56 from both sides.
-8y = -80
Now divide both sides by -8 to get y.
-80/-8 = 10.
y = 10.

-4(8 + 5n) = 8
again, multiply -4 by the factors inside the parentheses. It'll leave you with:
-32 + -20n = 8.
Since you're adding a negative 20n, you change it so that it's just subtracting it, so that it's:
-32 - 20n = 8.
Then add 32 to both sides.
-20n = 40.
Now divide both sides by -20 to get n.
40/-20 = -2.
n = -2.

Hope that helped! :)

Answer 2

solve,

8(7-y)= -24

multiply 8x(7-y)
= 56-8y=-24
=-8y= - 24 - 56
= -8y = -80
= -8y/-8 = -80/ -8
=y= 10


same with the other:

-4 ( 8 + 5n ) = 8
-32 + 20 n = 8
20n = 8 + 32
20n/20= 40/20
n= 2

Answer 3

8(7-y)=24
56-8y=24
-8y=24=56
= -32
Therefore y= -32 / -8 = 4



-4(8+5n)=8

-32-20n=8
-20n=8+32=40

Therefore n= 40 / -20 = -2

Answer 4

First, do the multiplication:
8(7-y)=-24
56-8y=-24
Then isolate the y:
-8y= -24-56
- 8y=-80
y= -80/-8
y=10

Second :
-4(8+5n) = 8
=>-32+20n = 8
=> 20n = 8+32
= 40
n= 40/20 = 2

Hope it is clear

Answer 5

Well we all know you need to figure out y. So write the problem out like this: 8 x (7-y)=-24. You know 8 x -3 is -24 so that makes y= 10 because 7 - 10 is -3.

Answer 6

1. 8(7-y)=24 56-8y = 24 -8y=24-56 -8y=-32 y=4

2.-4(8+5n)=8 -32-20n = 8 -20n=8+32 -20n=40 n=-2

Answer 7

8(7 -y) = -24. First divide both sides by 8.

u get 7-y = -3.

make y th subject of th formular. y =7+3

y = 10.

on th 2nd one -4( 8 +5n) = 8. n = -2. use th same formula as above

Answer 8

Solve,

8(7 - y)= -24

Divide both sides by 8,

(7 - y) = -3

7 - y = -3

y = 7 + 3

y = 10




Solve,

-4(8 + 5n) = 8

Divide both sides by 4,

-(8 + 5n) = 2

-8 - 5n = 2

5n = -8 -2

5n = - 10

n = -2

Answer 9

8(7-y) = -24
First you multiply the 8 by the (7-y)
So you have:

8*7 - 8*-y = -24
56 - 8y = -24

Then you subtract the 56 from both sides.
Now you have:

56-56-8y = -24-56
-8y = -80

Now you divide both sides by -8
So you get:

-8y/-8 = -80/-8

So y=10

You do the exact same procedure for the other problem. I hope this is right....otherwise my math skills suck.

Answer 10

1. Plug in x and y. --> 6(-5)(3) + 3 = -87 (D) 2. (1in)/(2.5mi) = x/(42 mi) --> (Cross Multiply) --> 1*42 mi*in = 2.5mi*x --> Divide both sides by 2.5 mi. --> x = 16.8 in (B) 3. Plug in numbers to find a point that works. For A. --> (-3) = (2) - 5 --> -3 = -3 is true so A. works. (A) 4. When dividing a variable with one exponent by the same variable with another exponent, you simply take the variable, d in this case, and subtract the bottom exponent from the top exponent, which gives d^(-2) which is the same thing as 1/d^2. (B) 5. 1 2/3 = 3/3 + 2/3 = 5/3. In order to calculate 5/3 - 11/18, we must have common denominators (the bottom number). In this case, we can find that 18 / 3 = 6, so all we have to do is take (5*6)/(3*6) = 30/18. 30/18 - 11/18 = 19/18 (A). I hope that helps. :)