If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation.

12x – y = –4
4x – 3y = –6

Question

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation.

12x – y = –4
4x – 3y = –6

vishweshshrimali5 · Answer

4x – 3y = –6

=> 12 x - 9 y = -18

now
12x – y = –4

12 x - 9 y = -18

_____________________
-      +           +
0   + 8y = 14
=> y = 7/4

now put this value  in 
4x - 3y = -6
=> 4x - 21/4 = -6
=> 4x = -3/4
=> x = -3/16