2012÷x+23=526
2012 : x = 526 - 23
2012 : x=503
x =2012 : 503
x = 4
(x×0,25+1999)×2000=(53+1999)×2000
(x×0,25+1999)×2000=2052 x 2000
(x×0,25+1999)×2000 = 4104000
x×0,25+1999 = 4104000 : 2000
x×0,25+1999= 2052
x × 0,25 = 2052-1999
x × 0,25 = 53
x = 53 : 0,25
x =212
`#` `I` `am` `two` `shifts` `eight`
`Nếu` `đúng` `cho` `mk` `xin` `ctrlhn` `nha`