System A) x + 3y = -9 2x + y = 4

system B) 3x + 4y = -9
2x + y = 4

1) How can we get System B from System A?
Choose 1

a) Replace one equation with the sum/difference of both equations

b)Replace only the left-hand side of one equation with the sum/difference of the left-hand sides of both equations

c)Replace one equation with a multiple of itself

d) Replace one equation with a multiple of the other equation

2) based on the previous answer, are the systems equivalent? in other words, do they have the same solution?

A) yes

B) No​