Question

Afla valorile lui a,b,c,d,daca:
a+b+c+d=940
a+b=440
d este de 4 ori mai mare decat c
b este de 2 ori mai mare decat c

Answer 1

440+c+4c=940
5c=940-440
c=500:5=100
d=100x4=400
b=2c=2x100=200
a+200=440
a=440-200=240

Answer 2

a+b=440 => c+d=940-440=500 d=4c => 4c+c=500 => 5c=500 => c=100 => d=500-c=500-100=400 b=2c => b= 100*2=200 => a=440-b=440-200=240