Question

El conjunto solución del sistema

3x + 5y = 8

4x - 3y = 1,

es:

a) (1, -1)
b) (1,1)
c) (-1,1)
d) (-1,0)

Answer 1

(4)3x +(4) 5y = 8(4)

(-3) 4x - (-3)3y = 1(-3)

12x + 20y =32

-12x - +9y= - 3

20 y + 9y =29

Y = 1

3x + 4x = 8 + 1 - 5(1) +3(1)

7x = 7

X = 1

Resouesta x= 1 , Y=1