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
e-lub [12.9K]
3 years ago
9

2X- 10 =30 solve for X

Mathematics
2 answers:
melamori03 [73]3 years ago
8 0
<h2>Answer:</h2><h3>X = 20</h3><h2>Step-by-step explanation:</h2>

First, add 10 to both sides.

2X - 10 + 10 = 30 + 10

2X = 40

Finally, we have to divide both sides by 2!

2X / 2 = 40 / 2

X = 20

Kazeer [188]3 years ago
5 0
2x - 10 = 30
2x = 40
x = 20
You might be interested in
The midpoint of is point P at (−6,−2). If point E is at (2,−4), what are the coordinates of point F?
Marina CMI [18]
(2,-3)

x1+x2/2 , y1+y2/2
-6+2/2 , -2-4/2
4/2, -6/2
2,-3
The answer is therefore (2,-3)
6 0
3 years ago
I spent 80% of my money and had $12 left. How much money did I have to start ?
xeze [42]
If you spent 80% that means you have 20% left, we'll use B as variable

20% x B = 12
0.20/0.20 x B = 12/0.20
B = 60


6 0
3 years ago
Use the equation to complete an algebraic proof that proves the answer is x = 7/6. Write your proof in your journal and upload y
dimaraw [331]

Answer:

Step-by-step explanation:

Show that if 3x – 7 = 5, then x = 4.

Here, our given statement is 3x – 7 = 5, and we're asked to prove x = 4.

x=4

Statements Reasons

1. 3x – 7 = 5 Given

2. 3x – 7 + 7 = 5 + 7 Addition of 7 to equation (1)

3. 3x + 0 = 5 + 7 Substitution of –7 + 7 = 0 into (2)

4. 3x = 5 + 7 Substitution of 3x + 0 = 3x into (3)

5. 3x = 12 Substitution of 5 + 7 = 12 into (4)

6. 3x⁄3 = 12⁄3 Dividing equation (5) by 3

7. x = 12⁄3 Substitution of 3x⁄3 = x into (6)

8. x = 4 Substitution of 12⁄3 = 4 into (7)

Is there such a thing as being too descriptive? Yep, and that was it, since over half the proof was devoted to telling the reader how to do arithmetic. We'll typically take numerical computation for granted, and write proofs like this:

5 0
2 years ago
The distance between City A and City B is 500 miles. A length of 1.8 feet represents this distance on a certain wall map. City C
Ratling [72]

Answer: 800 miles

Step-by-step explanation:

Let the actual distance between City C and City​ D be represented by x.

The information given in the question can be formed into an equation as:

1.8 feet / 2.88 feet = 500 miles / x

Cross multiply

1.8 × x = 500 × 2.88

1.8x = 1440

x = 1440/1.8

x = 800

Therefore, the actual distance between City C and City​ D is 800 miles.

3 0
3 years ago
I really need help with this
photoshop1234 [79]

Answer:

A+6+A = 20

A = 7

Step-by-step explanation:

J = number of problems Juana completed

A = number of problems Andy completed

J+A=20

J = A + 6

Replace J with A+6 in the first equation

A+6+A = 20

2A +6 = 20

Subtract 6 from each side

2A +6-6 = 20-6

2A =14

Divide by 2

2A/2 = 14/2

A = 7

5 0
2 years ago
Read 2 more answers
Other questions:
  • A population of 40 deer are introduced into a wildlife sanctuary it is estimated that the sanctuary can sustain up to 500 dear a
    12·1 answer
  • A researcher has collected the following sample data. The mean of the sample below is 5.
    6·1 answer
  • To paint a house, a painting company charges a flat rate of $500 for supplies, plus $50 for each hour of labor.
    10·1 answer
  • A red card is drawn from a standard deck of 52 playing cards. If the red card is not replaced, find the probability of drawing a
    6·1 answer
  • Write a polynomial function in it's factored form with zeros 5, -1, and 2
    9·1 answer
  • Lease please help me I will give brainliest to the first right answer!!!!
    5·2 answers
  • 4/9 x ? =1 what is the answer
    14·2 answers
  • *PLEASE HELP WITH SLOVING THESE QUESTIONS IT IS DUE SOON WORTH 100 POINTS*
    6·1 answer
  • lin is 5 inches taller than her cousin mai. together their heights are 113 inches. how tall is each girl
    6·2 answers
  • What is the average rate of change between: x = 1 and x = 2? x = 2 and x = 3? x = 3 and x = 4? x y 1 2 3 4 5 4 8 12
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!