Question

a+b+c=360
a:b=1 rest c
b = c+20
a,b,c=?
Va rog cat mai repede!

Answer 1

a:b=1 rest c  = > a = 1 x b + c = b + c  = c + c + 20  = 2c + 20 

 2c + 20  + c + 20 + c = 360 
4c +  40 = 360 
4c = 360 - 40 
4c = 320 
c = 320 : 4 
c = 80 
a = 2 x 80 + 20 = 180 
b = 80 + 20 = 100 

180 + 100 + 80 = 360 

Answer 2

a+b+c=360
a:b=1 rest c → a=1×b+c → a=1×c+20+c
b=c+20
________________________
1×c+20+c+c+20+c=360
4×c=360-(20+20)
4×c=360-40
4×c=320
c=320:4
c=80
b=80+20
b=100
a=1×100+80
a=180