Question

resolva para mim..
F-) x/4-y=0
x+y/5=x-y/2-1


G-) x-y/3 + x+y/5=4
5(x+y)- 4 (x-y)=100

Answer 1

f) x/4-y=0
x+y/5=x-y/2-1

x/4-y=0
2x+2y= 5x-5y -10

x/4-y=0
-3x+7y=-10


x-4y=0 (3)
-3x+7y=-10 (1)

3x-12y=0
-3x+7y=-10

-5y=-10
y=2


x-4y=0
x-8=0
x=8

S={8,2}