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=> (b + 5)(a - 5) = ba
ab -5b +5a - 25 = ba
5a - 5b = 25
5(a - b) =25
a - b = 25/5
a - b = 5
a = 5 + b
=> (b+5)(a - 4) = ba + 8
ab - 4b + 5a - 20 = ab + 8
5a - 4b = 20 + 8
5a - 4b = 28
5(5 + b) - 4b = 28
25 + 5b - 4b = 28
b = 28 - 25
b = 3
Hallando a:
a = 5 + b
a = 5 + 3
a = 8
La base mide 4 m y la altura mide 8 m