Question

2x+3y=1
x+y=-2
metodo de sustitucion

Answer 1

2x + 3y = 1                                   x + y = -2     x = -2 -y
2 ( -2 - y) = 1                    
-4 -2y = 1                           x = -2 -y
-2y = 1+4                           x = -2 -(2.5)
-2y = 5                               x = -2 -2.5
y = 5/2                               x = -4.5
y = 2.5