Question

ajutor dau coroana

PROBLEMELE 10 SI 11​

Answer 1

10) a+b+c=92

a-x=18

b-x=25

c-x=19

Adunam toate:

a-x+b-x+c-x= 18+25+19

a+b+c-3x=62

92-3x=62/-62

30-3x=0/÷3

10-x=0/+x

x=10

a-x=18 => a-10=18=> a=28

b-x=25 => b-10=25=> b=35

c-x=19 => c-10=19 => c=29

11) a+b=5987

c+b=7148

a+b+c=8383

Inlocuim:

5987+c=8383

c=8383-5987

c=2396

b+c=7148

b+2396=7148=> b=7148-2396

b=4752

a+4752=5987

a=5987-4752

a=1235