Question

a, b, c=?
b:a=4 rest 5
c:a=6 rest 1
b-c=20

Answer 1

b:2a:c=20-10 rest 6

=9 rest 4

Answer 2

Explicație pas cu pas:

b÷a=4 rest 5=>b=4×a+5

c÷a=6 rest 1=> c=6×a+1

Iar acum înlocuim in b-c=20

(4a+5)-(6a+1)=20

4a+5-6a-1=20

-2a+4=20

-2a=20-4

-2a=16

a=16÷(-2)

a=-8

b=4×(-8)+5

b=-32+5

b=-27

c=6×(-8)+1

c=-48+1

c=-47