All categories

3 years ago

Solve each equation

Mathematics

2 answers:

4vir4ik [10]3 years ago

8 0

3b+7-1=-3

3b+6= -3

Move +6 to the other side. Sign changes from +6 to -6.

3b+6-6= -3-6

3b=-9

Divide by 3

3b/3=-9/3

b= -3

3x+1-6x=7

3x-6x+1= 7

-3x+1= 7

Move +1 to the other side. Sign changes from +1 to -1.

-3x+1-1= 7-1

-3x=6

Divide by -3

-3x/3= 6/-3

x= -2

312=-6(7x-3)

Mutiply the bracket by -6

312= (-6)(7x)(-6)(-3)

312= -42x+18

Move +18 to the other side.

312-18= -42x+18-18

312-18= -42x

294=- 42x

divide by -42

294/-42= -42/-42x

x= -7

-4(4n-8)=128

Mutiply the bracket by -4

(-4)(4n)(-4)(-8)= 128

-16n+32= 128

move +32 to the other side

-16n+32-32= 128-32

-16n= 96

divide by -16

-16/-16n= 96/-16

n= -6

Answers:

b= -3

x= -2

x= -7

n= -6

Slav-nsk [51]3 years ago

7 0

Answer:

b= -3

x= -2

x= -7

n = -6

Step-by-step explanation:

3b+7-1=-3

3b = -3 -7 +1

3b = -10+1

3b= -9

b = -9/3

b= -3

3x+1-6x=7

-3x = 7-1

-3x= 6

x= -6/3

x= -2

312=-6(7x-3)

312 = -6*7x +6*3

312= -42x +18

312-18= -42x

294 = -42x

x= -294/42

x= -7

-4(4n-8)=128

-4*4n +4*8 =128

-16n +32 = 128

-16n= 128-32

-16n = 96

n=-96/16

n = -6

You might be interested in

The length of a parking Lot is 5 yards more than the width. If the area of the parking lot is 66 square yards, find the dimensio

Brums [2.3K]

Answer:

6 yards by 11 yards

Step-by-step explanation:

Factors of 66 are ...

66 = 1·66 = 2·33 = 3·22 = 6·11

The last pair of factors differ by 5, so represent the solution to the problem.

The width of the parking lot is 6 yards; the length is 11 yards.

7 0

3 years ago

SOMEONE WHOS GOOD AT EXPLAINING WITH FULL DETAILS

Oxana [17]

Im not sure what you are asking, but for a probability tree, you have the total # of something at the very top of the tree, next it branches out into groups, and those groups represent something like colored marbles or something... and to find percent you divide the total number like the number of marbles bye 100 and multiply that number bye the thing that you're trying to get job percent like a color of marbles, I hope this helped...

7 0

2 years ago

Read 2 more answers

Plz help me answer this

timofeeve [1]

Answer:

(-2, -8)

x = -2

y = -8

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define systems

13x - 6y = 22

x = y + 6

Step 2: Solve for y

Substitution

Substitute in x: 13(y + 6) - 6y = 22
Distribute 13: 13y + 78 - 6y = 22
Combine like terms: 7y + 78 = 22
Isolate y term: 7y = -56
Isolate y: y = -8

Step 3: Solve for x

Define original equation: x = y + 6
Substitute in y: x = -8 + 6
Add: x = -2

4 0

3 years ago

Stephanie had a total of 80 pieces of $ 2 and $ 10 notes. After spending 2/5 of her $ 2 notes and 8 pieces of her $ 10 notes, sh

Ghella [55]

Answer:

$440

Step-by-step explanation:

notes $2 - n

notes $10 - m

n + m = 80 ----------> m = 80 - n

1 - 2/5 = 3/5

$\frac{3}{5} * n = m - 8$

$\frac{3}{5} * n = 80 - n - 8 \\\\\frac{3}{5} * n + n = 72\\\\\frac{8}{5} * n = 72\\n = 45 \\m = 35\\$

45 * $2 + 35 * $10 = 90 + 350 = $440

3 0

3 years ago

Need help please! Asap!

docker41 [41]

Answer:

deese nots

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers