Question

calculeaza,b-a,respectiv,d+c stiind ca; a+b=407 ,b-195=183 ,d-c=378 ,d-287=437

Answer 1

b- 195 = 183 => b=183+195 => b = 378
a + 378 = 407 => a = 407 - 378 => a = 29
d - 287 = 437 => d = 437+287 => d = 724
724 - c = 378 => c = 724 - 378 => c = 346
 b - a = 378 - 29 = 349
d +c = 724 + 346 = 1070

Answer 2

$a+b=407 \\ b-195=183 \Rightarrow b=183+195 \Rightarrow b=378 \\ d-c=378 \\ d-287=437 \Rightarrow d=437+287 \Rightarrow d=724 \\ a+b=407 \Rightarrow a+378=407 \Rightarrow a=407-378 \Rightarrow a=29 \\ d-c=378 \Rightarrow 724-c=378 \Rightarrow -c=378-724 \Rightarrow c=346 \\ \boxed{a=29,b=378,c=346,d=724} \\ \boxed{b-a=378-29=349} \\ \boxed{d+c=724+346=1070}$