6
2
Hãy luôn nhớ cảm ơn và vote 5*
nếu câu trả lời hữu ích nhé!
15
11
`7,`
`7,3` $\huge($ `x` `-1/2` $\huge)$ `-` `5`. $\huge($ `+` `3/5` $\huge)$
`=` `7,3x` `-` `7,3` . `1/2` `-` `5.x` `-` `5` .`3/5`
`=` `7,3x` `-` `3,65` `-` `5x` `-` `3`
`=` $\huge($ `7,3` `-` `5x` $\huge)$ `+` $\huge($ `-` `3,65` `-` `3` $\huge)$
`=` `2,3x` `-` `6,65`
____________________________________________________________
`8,`
`3/4` `+` `1/4` `:` `3x` `=` `2/5`
`=>` `1/4` `:` `3x` `=` `2/5` `-` `3/4`
`=>` `1/4` `:` `3x` `=` `-7/20`
`=>` `3x` `=` `1/4` `:` $\huge($ `-7/20` $\huge)$
`=>` `3x` `=` `-5/7`
`=>` `x` `=` `-` `5/7` `:` `3`
`=>` `x` `=` `-` `5/21`
Vậy `x` `=` `-` `5/21`
___________________________________
`9,`
`9,2` `x` `-` `1/4` `+` `1/2` `x` `=` `5/6`
`=>` $\huge($ `9,2` `+` `1/2` $\huge)$ `x` `-` `1/4` `=` `5/6`
`=>` `46/5` `x` `=` `5/6` `+` `1/4`
`=>` `46/5` `x` `=` `13/12`
`=>` `x` `=` `13/12` `:` `46/5`
`=>` `65/552`
Vậy `x` `=` `65/552`
________________________________________________________
`10,`
`3/4` `+` `1/4` `:` `3x` `=` `-1/6`
`=>` `1/4` `:` `3x` `=` `-1/6` `-` `3/4`
`=>` `1/4` `:` `3x` `=` `-2/12` `-` `9/12`
`=>` `1/4` `:` `3x` `=` `-11/12`
`=>` `3x` `=` `1/4`
`=>` `3x` `=` `1/4` `:` `-11/12`
`=>` `3x` `=` `-3/11`
`=>` `x` `=` `-11`
Vậy `x` `=` `-1/11`
mk nghĩ là ko đúng lắm!
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