Gọi số cần tìm là a. Ta có :
a x 4 - 45 = a : 4 + 45
a x 4 - 90 = a : 4
(a x 4 - 90) x 4 = a
a x 16 - 360 = a
a x 15 = 360
a = 360 : 15
a = 24
Vậy số cần tìm là 24
gọi số cần tìm là a ,ta có:
ax4-45=a:4+45
ax4-90=a:4
(ax4-90)x4=a
ax16-360=a
ax15=360
a=360:15
a=24
là sao tớ chẳng hiểu giải chị tiết cho mình nha
24 dung 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
Gọi số cần tìm là a . Ta có:
a×4-45=a÷4+45
a×4-45=a×0,25+45
a×4= a×0,25+45+45
a×4=a×0,25+90
a×(0,25+3,75)=a×0,25+90
a×0,25+a×3,75=a×0,25+90
a×3,75=90(Hai tổng bằng nhau cùng bớt đi các số hạng giống nhau)
a=90÷3,75
a=24
24 dooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo nha
24 dung 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
