Question

Name the y value of the solution to the system of equations.

Use substitution:

-4x + y = 6

-5x - y = 21

Answer 1

y = 4x+ 6 and y = -5x - 21 ;
4x+ 6 = -5x - 21 ;
9x = -27 ;
x = - 3 ;
y = - 6 ;