Respuesta :
3a + b = 225
b = a - 15
3a + b = 225
a - b = 15
4a = 240
a = 60
3(60) + b = 225
180 + b = 225
b = 45
So, a = 60 and b = 45
b = a - 15
3a + b = 225
a - b = 15
4a = 240
a = 60
3(60) + b = 225
180 + b = 225
b = 45
So, a = 60 and b = 45