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
tekilochka [14]
3 years ago
5

Simplify and solve for x. ​ ​ 5(x+20)= 7x+30

Mathematics
2 answers:
hodyreva [135]3 years ago
6 0

Answer:

x = 35

Step-by-step explanation:

Solve for x:

5 (x + 20) = 7 x + 30

Expand out terms of the left hand side:

5 x + 100 = 7 x + 30

Subtract 7 x from both sides:

(5 x - 7 x) + 100 = (7 x - 7 x) + 30

5 x - 7 x = -2 x:

-2 x + 100 = (7 x - 7 x) + 30

7 x - 7 x = 0:

100 - 2 x = 30

Subtract 100 from both sides:

(100 - 100) - 2 x = 30 - 100

100 - 100 = 0:

-2 x = 30 - 100

30 - 100 = -70:

-2 x = -70

Divide both sides of -2 x = -70 by -2:

(-2 x)/(-2) = (-70)/(-2)

(-2)/(-2) = 1:

x = (-70)/(-2)

The gcd of -70 and -2 is -2, so (-70)/(-2) = (-2×35)/(-2×1) = (-2)/(-2)×35 = 35:

Answer: x = 35

valkas [14]3 years ago
4 0

Answer:

x =  35

Step-by-step explanation:

5(x+20)= 7x+30

5x + 100 = 7x + 30

-30                   -30

5x + 70 = 7x

-5x          -5x

70 = 2x

/2      /2

35 = x

You might be interested in
Write down the inequality described by "half of x is no more than six", and solve it<br>​
Montano1993 [528]
X/.5 > 6
(the > has a line under it but idk how to type that lol)
5 0
3 years ago
What is 7•8+1•40. Explain your answer
zaharov [31]

Answer:

96

Step-by-step explanation:

We will use the order of operations to solve the equation

7×8+1×40

multiplication before addition, so we do this first:

7×8=56

We change the equation to this:

56+1×40

Then we multiply:

1×40=40

We change the equation to this:

56+40

Then we add to solve:

56+40=96

3 0
3 years ago
What does 12g+8k=?????
Y_Kistochka [10]
Hi there! Here is the soloution to your question:
12g+8k= 8012 Grams

I Hope that helps!
8 0
3 years ago
Read 2 more answers
Please help me I need it bow
Tanzania [10]

Answer: A

Step-by-step explanation:

If the fraction is negative, and the numerator and denominator is negative, then if you were to do anything to them it would become a positive

6 0
3 years ago
Read 2 more answers
2a+3b=5? What is that someone please help ASAP !!
AnnyKZ [126]

Answer:

subtract 2a + 3b - 3b =5 - 3b

simply 2a = 5 -3b

divide both sides by 2 . 2a over 2 = 5 over 2 - 3b over 2

simply a= 5- 3b over 2

5 0
3 years ago
Other questions:
  • Which of the following represents "the difference between ten and a number is the sum of eight and a number"?
    7·1 answer
  • Can someone help me with this? giving brainliest to correct answer!
    10·1 answer
  • Question 2 and 3 in picture
    6·1 answer
  • I NEED HELP PLEASE !!!!
    6·1 answer
  • Solve the equation. Check the solution.<br> 1/2(2x-1)= -1/9 -7/9
    14·1 answer
  • An auto parts store is examining how many items were purchased per transaction at the store as compared to their online website.
    11·1 answer
  • 500 grams of quarters
    6·1 answer
  • Is the aspirin produced by the World’s Best Pharmaceutical Company better than that of a competitor at relieving headaches? 200
    12·1 answer
  • (9,4) and (5,-3) find the slope please !!!!
    12·1 answer
  • 9x9?????????????????????????
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!