Question

6/4x + 3/5y=3
x+y=1/2

Answer 1

6/4x + 3/5 y= 3
x+y= 1/2 ----- x= 1/2 -y

SUSTITUCIÓN

6/4 (1/2 - y) + 3/5 y = 3
6/8 - 6 / 4 y + 3/5 y = 3
3/5y - 3/2 y = 3 - 3/ 4
-0.9 y=2.25
y= 2.25/-0.9
y= -2.5

x= 1/2 - (-2.5)
x= 0.5 + 2.5
x= 3