Question

Please help me, I got B, am I right ?

A system of equations is given below:

y = 4x − 3
2x + 7y = 41

Which of the following steps could be used to solve by substitution?

2(y = 4x − 3) + 7y = 41
4x − 3 = 2x + 7y
2x + 7(4x − 3) = 41
2(y = 4x − 3)

Answer 1

@Austin6i6

Answer 2

which step do you think?

Answer 3

it's not b

Answer 4

so y=4x-3 in the first equation

Answer 5

replace y in the second equation with (4x-3)

Answer 6

So it would be c ?

Answer 7

yes

Answer 8

Thank you. Can you help me with one more @10115658

Answer 9

sure

Answer 10

Solve the system of equations and choose the correct answer from the list of options.

d + e = 15
−d + e = −5

Label the ordered pair as (d, e).

(0, 0)
(10, −5)
(5, 10)
(10, 5)

Answer 11

first isolate e in the first equation

Answer 12

can you do that?

Answer 13

What do you mean by isolate

Answer 14

get it by itself on one side of the equation

Answer 15

e=...

Answer 16

is it 5 ?

Answer 17

so what you do is subtract d from both sides.
e = 15 - d

Answer 18

then you plug in (15-d) for e in the second equation

Answer 19

is d 10 ?

Answer 20

so now we have
-2d + 15 = -5

Answer 21

therefore d = 10

Answer 22

now plug 10 in for d in the first equation
10 + e = 15

Answer 23

therefore e=5

Answer 24

So the answer would be (10,5 ) ?

Answer 25

yes

Answer 26

Thank you so much

Answer 27

no problem