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despejando "x"
X = (11y - 35) /3
-------------------
Entonces: (3x + 35) + (7x +5) = 180
Reeplanzando "x"
(3x + 35) + (7x +5) = 180
10x + 40 = 180
10 x = 140
x = 14
Entonces:
--> (11y - 35) /3 = 14
11y - 35 = 42
11 y = 77
y = 7º