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
Flura [38]
3 years ago
5

Solve the system by substitution. 3x + y = 20 -7y=x Please help

Mathematics
1 answer:
alisha [4.7K]3 years ago
8 0

9514 1404 393

Answer:

  (x, y) = (7, -1)

Step-by-step explanation:

The expression for x makes it easy to use that for substitution.

  3(-7y) +y = 20

  -20y = 20 . . . . . collect terms

  y = -1 . . . . . . . . . divide by -20

  -7(-1) = x = 7 . . . use y in the second equation to find x

The solution is (x, y) = (7, -1).

You might be interested in
An image is 2 units to the left of the pre-image.
stepladder [879]

Answer:

Santana's thinking is not correct, because the correct translation is 2 units to the left, not right.

Step-by-step explanation:

I just got that question and I got it right.

5 0
3 years ago
Read 2 more answers
Please help I need it for today
s2008m [1.1K]

Step-by-step explanation:

Disculpe pero de qué grado es usted para ayudarle un poquito más mejor

8 0
2 years ago
I need help plzzzzzzz!
myrzilka [38]
With what???!!??!! Lol
5 0
2 years ago
What is the distance between A and B on the number line below?<br> 2.15<br> 2.7
guapka [62]

Answer: 0.55

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Pls help me with my math
Zinaida [17]
360 / 3 = 120
120 hamburgers • 2 = 240 hotdogs
6 0
3 years ago
Other questions:
  • Anna is in a cave 39 feet below the cave entrance. She descends 19 feet, then ascends 25 feet. Find her new position relative to
    14·1 answer
  • What are the factors in 6x(x+3)?
    15·1 answer
  • A frozen pizza cost $3.00 in 2000. In 2015 it cost $2.50
    15·2 answers
  • Consider the following hypothesis test.H0:μ1−μ2=0 Ha:μ1−μ2≠0The following results are for two independent samples taken from the
    8·1 answer
  • What is the median of 73,45,88,90,90,81,83
    9·1 answer
  • Television sizes are labeled by the measure of the diagonal. What size is the TV below?
    5·1 answer
  • Use the given information to write the equation of the parabola.
    14·2 answers
  • -3/5 + ( - 1/10) simplified fraction
    6·1 answer
  • Need answer fast
    15·2 answers
  • Name the missing coordinate(s) of each triangle
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!