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B=x=11
4x=44
x=11
espero haberte ayudado
M = 3B ec. 2
Sustituyendo valores de la ec. 2 en la ec. 1:
3B + B = 44
4B = 44
B = 11
Beatriz tiene 11 manzanas
De la ec. 2:
M= 3B
M= 3*11
M= 33
Marcela tiene 33 manzanas
11*3 = 33
33+11 = 44
Saludos......