1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Molodets [167]
3 years ago
8

If 4x+7=12 what is the value of 8x+3

Mathematics
2 answers:
Valentin [98]3 years ago
7 0

There is actually 2 ways to solve this, I will show you both.

The first is obvious, solve for x in the first one, and plug it into the 2nd one and get the answer

4x + 7 = 12

4x = 5

x = \frac{5}{4}

8(\frac{5}{4}) + 3

2 * 5 + 3

10 + 3

13

The 2nd option is to manipulate the 4x + 7 to be 8x + 3

4x + 7 = 12

start by moving the 7 over

4x = 5

multiply both sides by 2

8x = 10

and add 3 to both sides

8x + 3 = 13

dlinn [17]3 years ago
5 0

Solve for x in the equation then plug it into the expression.

  1. 4x + 7 = 12
  2. 8x + 3

4x + 7 = 12

  • Subtract 7 from both sides.

4x = 5

  • Divide both sides by 4.

x = 5/4

  • Plug 5/4 for x into 8x + 3.

8(5/4) + 3 = 13

<h3>13</h3>
  • is your answer.
You might be interested in
I really need help really fast!!!
Sonbull [250]

Answer:

-3 sqrt 2 or -4.242640687

Step-by-step explanation:

4 0
3 years ago
Between what two consecutive whole numbers does 42 lie.
lana66690 [7]
4 and 5 because it talks about how
4 0
2 years ago
What is the distance between (–5, –2) and (–5, –8)?
steposvetlana [31]

Answer:

may be its -6 units

Step-by-step explanation:

because if you count the number it will be-6

6 0
2 years ago
Read 2 more answers
A piece of rope is 54 inches long. It is cut into pieces that are each 9 inches long.
bogdanovich [222]

Answer:

6 pieces of rope

Step-by-step explanation:

if the total is 54 and each are 9 you can make an equation

54= 9 x a

solve for a

to do this you divide 54 by 9

54/9=6

4 0
2 years ago
Read 2 more answers
Find the value of x. If​ necessary, write your answer in simplest radical form. 30 x 25 x nothing ​(Simplify your answer. Type a
murzikaleks [220]

Answer:

x = 38.05

Step-by-step explanation:

Using the Pythagoras theorem to find x

x is the hypotenuse

The other sides are opposite and adjacent

x² = 30²+25²

x² = 900+625

x² = 1525

x = √1525

x = 39.05

4 0
2 years ago
Other questions:
  • PLEASE HELP ME OUT FOR 40 POINTS PRETTY PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    13·2 answers
  • A basketball weighs an average of 22 ounces, and it is possible for its weight to vary at most 0.75 ounces from this average. Wh
    9·1 answer
  • What I the answer to this question question
    10·2 answers
  • A cable installer charges 40 per hour plus a 60 service charge your father firm hires to hook up his company's internet service
    5·1 answer
  • 8 over negative 4 ÷ negative 3 over 9.
    5·2 answers
  • Solve for answer to how do you factor 8 + 12
    8·1 answer
  • Please help ASAP for the brainliest answer
    12·2 answers
  • What is an equivalent fraction for the following fraction?<br> 5/8....<br> 09/16<br> 8/16<br> 10/16
    11·1 answer
  • Which line shows the graph of y = 4x - 5 reflected over the y-axis?
    11·1 answer
  • Wwwwwwwwwwwwwwwwwwwww
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!