Question

a-b-c=? a+b=571. b+c=326. a+c=523. a-b-c=cât?

Answer 1

2a +2b+2c =571 +326+523
2a +2b +2c =1420
1420:2 =710
710-571 =139(c)
a+c =523
a+139 =523
a=523-139
a =384
b+c=326
b+139=326
b=326-139
b=187
a -b-c =?
384-186-139=59
198-139=59(diferenta)

Answer 2

2(a+b+c)=571+326+523=1420
a+b+c=1420:2=710
a+b=571
c=710-571
c=139
b=326-139
b=187
a=571-187
a=384
a-b-c=384-187-139
a-b-c=58