Question

Am nevoie de ajutor urgeeent ex 3 si 4 dau coroana

Answer 1

3=1000 900 800 700
4=a+b= 200+500=700
b+d=500+400=900
c-a=600-200=400
b-d=500-400=100
c+d-a=600+400-200=800
c+d-(a+b)=600+400-(200+500)=1000-700=300