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
adoni [48]
2 years ago
14

5x - 7 + 2x = 21 solve the linear and state the property that justifies your first step

Mathematics
1 answer:
Debora [2.8K]2 years ago
4 0

Answer:

x = 4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define equation</u>

5x - 7 + 2x = 21

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Combine like terms:                    7x - 7 = 21
  2. Add 7 on both sides:                   7x = 28
  3. Divide 7 on both sides:               x = 4
You might be interested in
It took Mike 1/3 hour to mow 1/4 of a yard. How long will it take him to finish the entire yard?
Kazeer [188]

Answer:

4/3 of an hour, or 1.33 hours

Step-by-step explanation:

It took Mike 1/3 of an hour to mow 1/4 of the yard. This means when it has been 1 full hour, he would have mowed 3/4 of the yard, because \frac{1}{3} *3=1 hour. Because of this, we can multiply 1/3 by 4, because he has to mow 4 parts of his lawn, and he can do 1 part in 1/3 of an hour.

\frac{1}{3} *\frac{4}{4} =4/3 hours

3 0
2 years ago
An oil company fills 1 over 12 of a tank in 1 over 3 hour. At this rate, which expression can be used to determine how long will
IrinaK [193]

Answer:

(1/3)x12 hrs

Step-by-step explanation:

5 0
3 years ago
Two members of the Math Competition Team solve 13 problems in 1 hour. Assume all team members solve problems at the same rate. H
mylen [45]

14 because 2 people=13 problems in an hour

91/13=7

7times 2 is 14

14 IS YOUR ANSER PLS MARK ME BRAINLIEST :D

4 0
3 years ago
Can someone help me out
stich3 [128]

Answer:

m= -5/8

Step-by-step explanation:

Slope of a line containing the points,

\frac{y2 - y1}{x2 - x1}  = m

where, m is the slope

Here,

m =  \frac{7 - 2}{4 - 12}  =  \frac{  5}{ - 8}  =  \frac{ - 5}{8}

4 0
3 years ago
Read 2 more answers
Lim x tends to a {x^7-a^7/x^3-a^3]
denpristay [2]

Answer:

thank you very much

1235÷722

6 0
3 years ago
Other questions:
  • 3(4)<br> Solve 3(x-9)=21
    11·2 answers
  • Which of the following is the probability that when rolled a die will come up with either a 1 or a 2
    12·1 answer
  • 2. El
    12·1 answer
  • Which correlation coefficient corresponds to the best-fit line that most closely models it’s set of data. A. -0.87, B. -0.15. C.
    12·1 answer
  • Find f(g(x)) when f(x) = 3x2 + x - 8, and g(x) = 4x + 5.
    5·1 answer
  • Select all equations that are true. A. 9 . 21 × 10 3 = 921 B. 9 . 21 × 10 1 = 92 . 1 C. 0 . 921 × 100 = 921 D. 0 . 921 × 10 4 =
    5·1 answer
  • Which compound inequality is represented by the graph?
    9·2 answers
  • The Slow Fix auto shop charges $28 for parts and $48 per hour of labor. The We Work Cheaper auto shop charges $59 for parts and
    13·1 answer
  • (I’ll brainlist)
    11·2 answers
  • Which formula would be used to find the measure of angle 1? One-half(a° b°). One-half(a° – c°). One-half(b° c°). One-half(a° – b
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!