3 years ago

Solve using ELIMINATION (with step by step explanation) Please 3x+y=-9 y=5x+7

Mathematics

1 answer:

Yuki888 [10]3 years ago

7 0

Answer:

<h2>x = -2 (verified by algebra) ✅</h2>

Step-by-step explanation:

Since we are given the value of y, we can replace it with 5x + 7.

We now have: 3x + 5x + 7 = -9

We can now simplify by adding 3x and 5x to get 8x.

8x + 7 = -9

We can subtract 7

8x = -16

And now, we divide by 8

x = -2

We can check to make sure we are correct

3(-2) + 5 (-2) + 7 = -9

-6 + -10 + 7 = -9

-9 = -9 ✅

You might be interested in

–6x(8 + 6x) – 8(1 – 5x)

leva [86]

Answer:

-36x² - 8x - 8

Step-by-step explanation:

Distribute 6x and -8 through the parenthesis:

-48x + -36x² - 8 + 40x

Collect the like terms:

-8x - 36x² - 8

Use the commutative property to reorder the terms:

-36x² - 8x - 8

7 0

3 years ago

Can you match the teacher's comments to the definitions?

Afina-wow [57]

Answer:

Daniel =Were you thinking of perpendicular lines?

Oris= It seems like you've got the basic idea, but your definition could be more precise.

Kaoris= Yes well done...

3 0

1 year ago

In recent times, with mortgage rates at low levels, financial institutions have had to provide more customer convenience. One of

omeli [17]

Answer:

Step-by-step explanation:

Find attached the solution

6 0

3 years ago

What’s the lowest common multiple of 3 and 5

elena-s [515]

Answer:

Step-by-step explanation:

15 is the lowest multiple that 3 and 5 have in common.

8 0

3 years ago

Read 2 more answers

What is 5q-4p+6=4q-8

seraphim [82]

Answer:

q=4p-14

Step-by-step explanation:

5q-4p+6=4q-8

5q-4q-4p=-8-6

q-4p=-14

q=-14+4p

q=4p-14

7 0

3 years ago