Hola, planteamos así:
Sandra = 10 soles
Rita = (a + 8) soles
Julia = "a" soles
* Recuerda que la suma de sus aportes es igual a 36 soles, por lo tanto:
10 + a + 8 + a = 36
2a = 36 - 18
2a = 18
a = 9
Julia aportó 9 soles.
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Hola, planteamos así:
Sandra = 10 soles
Rita = (a + 8) soles
Julia = "a" soles
* Recuerda que la suma de sus aportes es igual a 36 soles, por lo tanto:
10 + a + 8 + a = 36
2a = 36 - 18
2a = 18
a = 9
Julia aportó 9 soles.