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
kkurt [141]
3 years ago
9

Can somebody solve this system equation using addition please?

Mathematics
1 answer:
givi [52]3 years ago
7 0

-4x - 5y = 7

3x + 5y = -14

You can add these two equations together straightaway since the y-terms have opposite coefficients.

-4x - 5y = 7

3x + 5y = -14

+___________

-x - 0 = -7

-x = -7

x = 7

Substitute 7 for x into either of the original equations and solve algebraically to find y.

3x + 5y = -14

3(7) + 5y = -14

21 + 5y = -14

21 = -14 - 5y

35 = -5y

-7 = y

Finally, check work by substituting both x- and y-values into both original equations.

-4x - 5y = 7

-4(7) - 5(-7) = 7

-28 + 35 = 7

7 = 7

3x + 5y = -14

3(7) + 5(-7) = -14

21 - 35 = -14

-14 = -14

Answer:

x = 7 and y = -7; (7, -7).

You might be interested in
Hhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeelllllllllllllppppppppp
evablogger [386]
Okay so first what you wanna do is
8 0
3 years ago
Read 2 more answers
What is the value of m<br> What is the value of n
NeTakaya

Answer:

Step-by-step explanation:

M is 90 degrees anytime you see that square it equals 90 and any time you see that half circle that is obtuse so more than 90 degrees and doing the math the answer to n would be around 127

6 0
3 years ago
A tortoise takes 1 1/4​ hours to walk 5/6 miles. At this rate, how long does it take her to walk 1 mile?
Illusion [34]

Answer:

I think it is 3/2

Step-by-step explanation:

1 1/4 ÷ 5/6

5/4 × 6/5 = 30/20= 3/2

3 0
2 years ago
I NEED HELP ASAP!!! PLEASE REPLY!!
Paha777 [63]

Answer:

Both are correct

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Need answer asap
torisob [31]
Assuming she bought one pack of each and that’s all she can get.
She can make 42 arrangements with 4 balloons each:
2yellow
1blue
1red
(Having 28 red left over)
Good luck, again we are assuming she bought the balloons because it says “balloon packs come in”
7 0
3 years ago
Other questions:
  • En términos de π , ¿cuál es el volumen de la esfera?
    13·2 answers
  • If X and Y are any random variables with E(X) = 5, E(Y) = 6, E(XY) = 21, V(X) = 9 and V(Y) = 10, then the relationship between X
    6·1 answer
  • 10 points.<br> Find the area of the figure. Round to the nearest tenth if necessary.
    9·1 answer
  • Can you solve the following
    11·2 answers
  • A dishonest shopkeeper has two false balances. one balance weighs 10℅ more while buying the goods while other weighs 10℅ less wh
    11·1 answer
  • What is this figure called and what is the base?
    11·2 answers
  • Please help me with this!!!
    14·1 answer
  • Solve log6 + log6 (x-1) = 1
    12·2 answers
  • 9 (m+5)-3(m-2)=8m+31<br> PLS SHOW WORK
    12·2 answers
  • When we solve for a system of equations, that means we use more than one equation. Is it possible to have two different equation
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!