Question

For the following system, subtract the second equation from the first equation.

3x - 4y = 7
3x + 2y = -5
What is the resulting equation in simplest form?

-6y = -12
-6y = 12
-2y = -12
2y =12

Answer 1

here we multiply the 2nd eqation with -1 and then add both
and answer is
-6y=12