Question

Y(5+2x)=10x
-y(3/2x+10)=5x
himpunan penyelesaian spldv

Answer 1

5y + 2xy = 10 x ....(1)

-3/2 xy - 10 y = 5x ...kalikan 2
-3 xy - 20 y = 10 x ...(2)

(1) = (2) krn bernilai sama  = 10 x

5y + 2xy = - 3xy - 20y
2xy + 3xy = -20y - 5y
5 xy = - 25 y
5x = -25
x = - 5 ....sub ke (1)

5x + 2xy = 10 x
5(-5) + 2(-5) y = 10(-5)
-25 - 10y = - 50
-10 y = - 25
y = 2,5