Question

Expand: (3x – 4y + 7)?​

Answer 1

Answer:

Given

[1]

XXX

3

x

−

4

y

=

7

[2]

XXX

x

−

y

=

2

There are several ways to solve this but since it was asked under "Systems Using Substitution", we will approach it that way:

Rearrange [2] into an equation in terms of

x

[3]

XXX

x

=

y

+

2

Now substitute

(

y

+

2

)

for

x

in [1]

[4]

XXX

3

(

y

+

2

)

−

4

y

=

7

Expanding and simplifying [4]

[5]

XXX

−

y

+

6

=

7

or

[6]

XXX

y

=

−

1

Now substitute

(

−

1

)

for

y

back in [2] (or you could have used [1])

[7]

XXX

x

−

(

−

1

)

=

2

Simplifying:

[8]

XXX

x

=

1

Step-by-step explanation:

I hope this helps you dear

Answer 2

Answer:

jhubjbj

Step-by-step explanation:

jhvhivgvvygcgcycycygyc