All categories

3 years ago

Solve the system by elimination. -8X – 10y = 20 -8x – 6y = -4

Mathematics

1 answer:

In-s [12.5K]3 years ago

6 0

Answer:

(5, - 6 )

Step-by-step explanation:

Given the 2 equations

- 8x - 10y = 20 → (1)

- 8x - 6y = - 4 → (2)

Multiply (2) by - 1

8x + 6y = 4 → (3)

Add (1) and (3) term by term to eliminate the x- term, that is

- 4y = 24 ( divide both sides by - 4 )

y = - 6

Substitute y = - 6 into either of the 2 equations and solve for x

Substituting into (1)

- 8x - 10(- 6) = 20

- 8x + 60 = 20 ( subtract 60 from both sides )

- 8x = - 40 ( divide both sides by - 8 )

x = 5

solution is (5, - 6 )

You might be interested in

What is the constant of proportionality in this equation? y= 20x

il63 [147K]

Answer:

k=20

Step-by-step explanation:

The constant of proportionality, k, measures the constant value of the ratio between two proportional quantities, being y and x in this case. Essentially, y/x will always equal 20, the constant of proportionality.

8 0

3 years ago

Hello! -will give brainiest to the correct answer- (just doing this for fun)

Nataly_w [17]

Answer:

8 • (y + 3)

Step-by-step explanation:

Processing ends successfullyplz mark me as brainliest :)

6 0

4 years ago

Read 2 more answers

Given the series: Help will give brainlest

Tju [1.3M]

Answer:

use math way this will help you with this but i think it is the second one

Step-by-step explanation:

6 0

2 years ago

Simplify 2a²b x 3a³b

katen-ka-za [31]

6a^5b x 3a^3b the little arrows before the number resembles the exponet.

6 0

4 years ago

Solve The Equation ___ - (-7) = 5

irinina [24]

Answer:

-2

Step-by-step explanation:

x-(-7)=5

x+7=5

-7

x=-2

5 0

3 years ago