Which of the following is equivalent to 5x - 4y +6 - 3x + 4y - 33 - 12?

Answer: its D
Step-by-step explanation:
Multiply each equation by the value that makes the coefficients of
y
opposite. (
−
4
)
⋅
(
5
x
−
3
y
)
=
(
−
4
)
(
23
)
(
3
)
⋅
(
7
x
−
4
y
)
=
(
3
)
(
33
)