Question

Ajutor!!!Ex 4. Dau coroana

Answer 1

Inlocuim valorile:
x=700-y
z=500-y
Aflam cat inseamna y:
700-y+500-y=800
1200-2y=800
2y=400
y=200
Probam pentru a afla valorile celorlalte necunoscute:
x+y=700
x+200=700 => x=700-200=500
x=500
y+z=500
200+z=500 => z=500-200=300
z=300
x+z=800
500+300=800

Answer 2

x+y+y+z+x+z=700+500+800
2x+2y+2z=2000
2(x+y+z)=2000 :2
x+y+z=1000
x+y=700
y+z=500
x+z=800

x+y+z=1000
x+y=700
700+z=1000
z=300

y+z=500
y+300=500
y=200

x+y=700
x+200=700
x=500

x=500
y=200
z=300