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
Elza [17]
3 years ago
12

X-4y=7 -6x-3y=12 how do i solve by substitution​

Mathematics
1 answer:
Dafna1 [17]3 years ago
3 0

Answer:

x = 15

y = 2

Step-by-step explanation:

X-4y=7 | ×6 |

-6x-3y=12 | ×1 |

6x - 24y = 42

-6x - 3y = 12

___________+

27y = 54

y = 54/27

y = 2

x - 4y = 7

x - 4(2) = 7

x - 8 = 7

x = 7 + 8

x = 15

You might be interested in
If a 12-meter-tall airplane hangar casts a 18-meter shadow at the same time a parked jet casts a 6-meter shadow , how tall is th
8090 [49]
Given 
  12 meters tall airplane
  18 meter shadow of airplane
  6 meter shadow of jet
Find the measurement of the jet (y)
Solution
 6y = 12 + 18                         30
-----    ---------    ---->     y   = -------    ----------->  y= 5
 6           6                              6

The answer is 5 meters tall is the measurement of a parked jet. 
5 0
4 years ago
Grade six math, Two large and 1 small pumps can fill a swimming pool in 4 hours. One large and 3 small pumps can also fill the s
Sladkaya [172]

This question is the same as yours and has a verified answer:

brainly.com/question/9118873?referrer=fromSearch

I hope this helps!

6 0
3 years ago
If a cone has a radius of 6 cm and the height of 18 cm what is it's volume ?
VLD [36.1K]
The volume is V≈678.58cm³
4 0
3 years ago
Please help 2х -3y =18
siniylev [52]

Answer:

x = 3(6 + y)/2

Step-by-step explanation:

Solving for x

Add 3y to both sides.

2x = 18 + 3y

Divide both sides by 2.

x = 18 + 3y/2

Factor out the common term 3.

x = 3(6 + y)/2

3 0
3 years ago
Give one number that makes the inequality 3x < 25 true
elena55 [62]
1 is the safest answer.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Yea i’m confused so like help?
    12·2 answers
  • Noor has 4 cups of hot chocolate in his thermos. He offers 5/8 cup servings of hot chocolate to some friends. What is the greate
    10·1 answer
  • Item 2 Solve the equation. 6.7x=5.2x+12.3
    12·1 answer
  • Suppose that circles A and B have a central angle measuring 40°. Additionally, circle A has a radius of 5 2 ft and the radius of
    7·1 answer
  • Please help ill give u brainliest!!!
    15·2 answers
  • Distribute – 3 (-3x2 + 5x).
    5·1 answer
  • A triangle has sides of length 2 cm and 12 cm. What can you say about the length of the third​ side?
    15·1 answer
  • Which best describes the relationship between the two triangles below?
    12·1 answer
  • Fre e points come and get em
    7·2 answers
  • The teacher asks the students to record as many different patterns they can think of for her number rule. Identify what type of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!