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e^(4x+1)-2y=4
Aislamos la variable "y"; para resolver el sistema de ecuaciones por igualación:
e^(4x)+y=3 ⇒y=3-e^(4x)
e^(4x+1)-2y=4 ⇒y=-[4-e^(4x+1)]/2
Entonces:
3-e^(4x) =-[4-e^(4x+1)]/2
6-2e^(4x)=-4+e^(4x+1)
e^(4x+1)+2e^(4x)=6+4
e(e^(4x)+2e^(4x)=10
(e^(4x))(e+2)=10
e^(4x)=10/(e+2)
lne^(4x)=ln(10/(e+2))
4x.lne=ln(10/(e+2)) (ln e=1)
4x=ln(10/(e+2))
x=(ln(10/(e+2)))/4 ≈ 0.187785...≈0.1878
Ahora calculamos el valor de "y";
y=3-e^(4x)
y=3-e^(ln(10/(e+2)))
Solución: x=(ln(10/(e+2)))/4