Solve the follow system of linear equations by using elimination.

Question

4x + y = - 11

3x - 5y = 9

Answer 1

multiply 1st by 5 to get

20x +5y =-55

add 2nd equation to eliminate one variable

23x = 64

x = 64/23

y = 11-4x = 253/23 - 256/23 = -3/23

3x-5y = 9

3(64)/23 -5(-3/23) = (192+15)/23= 207/23=9