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
Ratling [72]
3 years ago
12

3(x + 1) - (x-3) = 12 I need help I don’t I understand

Mathematics
2 answers:
Marina CMI [18]3 years ago
5 0
Answer: 3



3X+3-X+3=12
2X+6=12
2X=12-6
2X=6
X=3
balandron [24]3 years ago
4 0

Answer:

3

Step-by-step explanation:

3x+3-x+3=12

3x-x=12-3-3

2x=6

x=6/2

x=3

You might be interested in
The difference of a number x and 1/2
Yuliya22 [10]
X - 1/2 (if you meant the difference between)
8 0
3 years ago
Nine scores have an average of 8. Scores x and x+1 are added, and these increase the average to 9. Find x
Degger [83]

Answer:

x must be 13

Step-by-step explanation:

Represent the nine scores by a, b, c, d, e, f, g, h, i.

Write the following equation to indicate that the average of these nine scores is 8:

a+b+c+d+e+f+g+h+i

----------------------------- = 8, or <em>a+b+c+d+e+f+g+h+i = 72</em> if we multiply both

               9                      sides of this equation by 9.

Next, we add scores x and x+ 1 to

a+b+c+d+e+f+g+h+i  +  x + x + 1

and divide the result by 11, as there are now 11 scores instead of just 9:

a+b+c+d+e+f+g+h+i  +  x + x + 1

----------------------------------------------

                        11

Earlier, we saw that a+b+c+d+e+f+g+h+i = 72.  We can now replace

a+b+c+d+e+f+g+h+i in the above fraction by 72:

 72 + 2x + 1

------------------- = 9 (as the new average is 9)

         11

Multiplying both sides of this equation by 11 results in:

73 + 2x = 99, or  2x = 26.

Then x must be 13, and x + 1 must be 14.

3 0
3 years ago
If f(x) =3x^2 + 1 and g(x)=1-x
motikmotik

Answer: f  ( 1 − x ) = 3 x 2 − 6 x + 4

Your WElcome

8 0
3 years ago
Read 2 more answers
Write an inequality that represents each sentence.
ivann1987 [24]
1. Julia's ≤ Rachel's hair

2. 40 < 74
7 0
3 years ago
Through research scientists found that the body or a 200 lb person consist of 3.2*10 to the nigetive five lbs of zinc. In the bo
denis-greek [22]
In 1500 people of 200 lb each, the total weight would be 300000 lb.
Set up a proportion: 200lb/3.2*10^-5 = 300,000lb/x
(3.2*10^-5*300,000)/200 = x
x = 0.48, I believe
8 0
3 years ago
Other questions:
  • PLEASE HELP AND PLEASE SHOW YOUR WORKING
    14·1 answer
  • A hot bowl of soup cools according to Newtons law of cooling. Its temperature (in degrees Fahrenheit) at time t is given by T(t)
    14·1 answer
  • How much is 150 us dollars equal to canadian dollars
    9·2 answers
  • What is the total interest on a ten-year. 6.1% loan with a principal of $32,000?
    6·1 answer
  • A circle graph titled Education Level. 13 percent is some high school, 26 percent is completed high school, 27 percent is some c
    6·1 answer
  • 15) -1 - 2mx =6yx solve for x​
    13·1 answer
  • the length of tangent is 15 cm drawn from point whose distance from center of circle is 17 cm find the radius of circle​
    6·1 answer
  • A large cheese pizza costs
    7·1 answer
  • Which equation below can be used to determine the value of x?
    6·2 answers
  • Help quickly as possible thank you :) ​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!