Question

rezolvati cat de repede puteti​

Answer 1

Răspuns:

primul elev:x+x+8=2x+8

al 2-lea elev:x+8

al 3-lea elev:x

in total au 136 de probleme:

2x+8+x+8+x=136

4x+16=135

4x=136-16

4x=120

x=120:4

x=30 => al 3-lea elev a rezolvat 30 de probleme

al 2-lea :30+8=38 probleme

primul:30+38=68 probleme

Answer 2

a+b+c=136

a=b+c

b=c+8

b+c+b+c=136

c+8+c+c+8+c=136

c·4+16=136

c·4=136-16

c·4=120

c=120÷4

c=30

b=30+8    b=38

a=38+30    a=68