4 7. Si a/b = 4/9 además, a + b = 52; calcula «b - a»
e) 23
a) 20
b) 18
c) 15
d) 19
e) 23
a) 20
b) 18
c) 15
d) 19
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Verified answer
Respuesta:
a)
Explicación paso a paso:
Hay que amplificar
4/9 = 8/18 = 16/36
a = 16
b = 36
36 - 16
20