Choose the equivalent system of linear equations that will produce the same solution as the one given below.

4x - y = -11
2x + 3y = 5

a)-4x - 9y = -19
-10y = -30

b)4x + 3y = 5
2y = -6

c)7x - 3y = -11
9x = -6

D)12x - 3y = -33
14x = -28

Question

Choose the equivalent system of linear equations that will produce the same solution as the one given below.

4x - y = -11
2x + 3y = 5 

a)-4x - 9y = -19
-10y = -30 

b)4x + 3y = 5
2y = -6 

c)7x - 3y = -11
9x = -6 

D)12x - 3y = -33
14x = -28

anonymous · Answer

a) 4x - y = -11
   2x + 3y = 5 

-y=-11-4x /:(-1)
y=11+4x

2x+3(11+4x)=5
2x+33+12x=5
14x+33=5/-33
14x=-28/:14
x=-2

4*2-y=-11
9-y=-11/-9
-y=2/:(-1)
y=-2