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
Semmy [17]
4 years ago
8

Write three equations whose solution is x=3.5

Mathematics
1 answer:
My name is Ann [436]4 years ago
3 0

Answer:

  • 1. 2x + 23 = 30
  • 2. 3x + 19.5 = 30
  • 3. (10x - 20)/ 5 = 3

Explanation:

Work backward:

1. 2x + 23 = 30

Start:

  • x = 3.5

Multiply the equation by 2:

  • 2x = 2 (3.5)
  • 2x = 7

Subtract 30 from both sides

  • 2x - 30 = 7 - 30
  • 2x - 30 = -23

Add 23 and 30 to both sides:

  • 2x + 23 = 30

2. 3x + 19.5 = 30

Start:

  • x = 3.5

Add 6.5 to both sides:

  • x + 6.5 = 10

Multiply by 3:

  • 3(x + 6.5) = 30

Distributive property:

  • 3x + 19.5 = 30

3. (10x - 20)/ 5 = 3

Start:

  • x=3.5

Multiply by 10:

  • 10x = 35

Subtract 20:

  • 10x - 20 = 15

Divide by 5:

  • (10x - 20)/ 5 = 15/5

  • (10x - 20) / 5 = 3
You might be interested in
Please help me simplify these expressions
Archy [21]

Answer:

Step-by-step explanation:

If base of variable is same, add the powers

1) x² * x * x³ * x⁵ = x²⁺¹⁺³⁺⁵ = x¹¹

2) -2n² * -n⁴ * 5n³ = (-2* -1*  5 ) *n²⁺⁴⁺³ = 10n⁹

3)-3x⁴ * 2x⁵ * - x = (-3 * 2 * -1)* x⁵⁺⁴⁺¹ = 6x¹⁰

5 0
3 years ago
Read 2 more answers
? Help please ?? ??? ??
pochemuha
It’s D, because the x-value, 8, has two y-values, the 5 and 9. In order to be a function, each x-value has to have only one y-value.
8 0
3 years ago
What is –22x+9x simplified ​
rodikova [14]

Answer:

I think -13 x and thanks for point

5 0
3 years ago
Read 2 more answers
John got the follow scores on his tests what is the interquartile range of his scores 78,57,90,60,89,69,95
Aleksandr-060686 [28]
57, 60, 69, 78, 89, 90, 95 (90-60=30) Answer= C. 30
7 0
3 years ago
a rain gutter is to be installed around a house whose Foundation is shown to the right find the perimeter of the house then find
Alexus [3.1K]
The perimeter is 96 feet, and 96 X 4.77 = is 457.92
5 0
3 years ago
Other questions:
  • BRAINLIEST!!<br> 12. How can the figure be cut so that the resulting cross section is a rectangle?
    15·2 answers
  • Another ez 10 pnts :D
    14·1 answer
  • Amanda and her four sisters divided 1,021 stickers equally how many did each girl receive
    7·1 answer
  • Its not A i just took the test on edg and it was wrong.
    6·1 answer
  • 6+4-(4x2)+22^3=?? Can someone help! PLEASE THIS IS MY THIRD TIME ASKING PLEASE HELPPP
    8·2 answers
  • which of the following lengths cannot be the lengths of a triangle? 4,6,9 a.) 3,4,2 b.) 2,2,3 c.) 1,1,2 d.)
    15·1 answer
  • Find the LCM of 15 and 5​
    5·2 answers
  • Type the integer that makes the following addition sentence true for Brainliest!!!!!!!!
    13·2 answers
  • Eric starts with 10 milligrams of a radioactive substance. The amount of the
    5·1 answer
  • Proportional quantities are always in the same _______________.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!