Question

What is the value of y using the elimination method
4x - 5y = -9
-4x + y = -7

Answer 1

4x - 5y = -9

-4x + y = -7

----------------- +

-4y = -16

y = 4

-4x + y = -7

-4x + 4 = -7

-4x = -11

x = 11/4

x = 2,75