y =-5x -18 3x + 5y = -2? (Substitution and Elimination question.)
y = -5x -18 (1)3x + 5y = -2 (2)
Sub (1) into (2)
3x + 5[-5x - 18 ] = - 2
3x - 25x - 90 = - 2
-22x = 88
x = 88/-22 = -4
And using (1) we have
y = -5[(-4) -18] = 20 - 18 = 2
