x.31 + (0+1+2+3+...+30)=1240
x.31 + 465=1240
x.31=1240-465
x=775 : 31
x=25
#Học tốt
x.31 + (0+1+2+3+...+30)=1240
x.31 + 465=1240
x.31=1240-465
x=775 : 31
x=25
#Học tốt
x + ( x+1) + (x+2) + ( x+3) +...+ (x+30)= 1240
x+(x+1)+(x+2)+(x+3)+........+(x+30)=1240
x+(x+1)+(x+2)+(x+3)+.....+(x+30) = 1240
x+( x+1)+(x+2)+(x+3)+.......+(x+30)=1240
Tìm x:
x+(x+1)+(x+2)+(x+3)+.............+(x+30)=1240
tìm x
x+(x+1)+(x+2)+(x+3)+........+(x+30)=1240
a) x + (x + 1) + (x + 2) + (x+3)+...+(x + 30) = 1240
b) x + 1 + 2 + 3 + ... + x = 210
tìm x thuộc N biết:
a)x+(x+1)+(x+2)+(x+30)+...+(x+30)=1240
b)1+2+3+...+x=210
Tìm x, biết:
a) x+(x+1)+(x+2)+(x+3)+...+(x+30)=1240
b) 1+2+3+...+x=210