Question

3x - 4y = 7
3x + 2y = -5
When the second equation is subtracted from the first, the resulting equation is _____.

A. -6y = -12
B. -6y = 12
C. -2y = -12
D. 2y = 12

Answer 1

most days -4-2=-6 and 7+5=12 does that help

Answer 2

I don';t understand ... @Michiganboy21

Answer 3

ok look at it like this
x\[3-3=0 \]
y\[-4-2=-6\]
coefficient\[7+5=12\]

Answer 4

\[3x-4y=7\\3x+2y=-5\]
\[3x-3x+2y+4y=-5-7\]
\[\boxed{6y=-12\Leftrightarrow-6y=12}\]