Respuesta :
3x + 2y = 16 Ec1
5x + y = 15 Ec2
x1 = 16 - 2y/3
5 (16 - 2y/3) + y = 15
5 (16 - 2y) = 3 (15 - y)
80 - 10y = 45 - 3y
-10y + 3y = 45 - 80
(-) -7y = -35
7y = 35
y = 35/7
y = 5
3x + 2y = 16 Ec1
3x + 2(5) = 16
3x + 10 = 16
3x = 16 - 10
3x = 6
x = 6/3
x = 2
5x + y = 15 Ec2
5x + 5 = 15
5x = 15 - 5
5x = 10
x = 10/5
x = 2
R// x = 2 ; y = 5
Comprobación
3x + 2y = 16 Ec1
3(2) + 2(5) = 16
6 + 10 = 16
16 = 16
5x + y = 15 Ec2
5(2) + 5 = 15
10 + 5 = 15
15 = 15
Espero haberte ayudado. Suerte en los estudios ≧◠◡◠≦.