Respuesta:
10
Explicación paso a paso:
m + d = 40
m = 40 - d
60m + 100d = 2800
60(40 - d) + 100d = 2800
2400 - 60d + 100d = 2800
40d = 2800 - 2400
40d = 400
d = 400/40
d = 10
m = 40 - 10
m = 30
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Respuesta:
10
Explicación paso a paso:
m + d = 40
m = 40 - d
60m + 100d = 2800
60(40 - d) + 100d = 2800
2400 - 60d + 100d = 2800
40d = 2800 - 2400
40d = 400
d = 400/40
d = 10
m = 40 - d
m = 40 - 10
m = 30