Răspuns:
a = 65 ; b = 120 ; c = 20 ; d = 30
Explicație pas cu pas:
a+b+c+d = 235
a-5 = b/2 = 3c = 2d I·2 =>
a-5 = 3c => a = 3c+5
b/2 = 3c => b = 6c
d = 3c/2
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3c+5+6c+c+3c/2 = 235 I·2 =>
6c+10+12c+2c+3c = 470 =>
23c = 470-10 = 460 =>
c = 460/23 => c = 20
a = 3·20+5 => a = 65
b = 6·20 => b = 120
d = 3·20/2 => d = 30
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a+b+c+d = 65+120+20+30 = 185+50 = 235 = corect