Question

suma a 4 nr consecutive este 90. Determinati nr

Answer 1

x+x+1+x+2+x+3=90
4x+6=90
4x=84
x=21
21+22+23+24=90

Answer 2

a+b+c+d=90. ............=segment
a,b,c d,=consecutive
a,b,c,d=?
a..............
b..............+1. =90
c..............+1+1
d...............+1+1+1
90-(1+1+1+1+1+1)=84(4segmente egale)
84:4=21(un segment)
a=21
b =22
c =23
d=24

sper ca te-am ajutat.