Question

Sa se determine a,b,c stiind ca :
2a+2b+2c=200 si a+b=60
b+c=75

Answer 1

2a+2b+2c=200
2(a+b+c)=200
a+b+c= 200÷2
a+b+c =100
60+c=100
c=100-60
c=40
b+c=75
b+40=75
b=75-40
b=35
a+b=60
a+35=60
a=60-35
a=25