2 câu trả lời
$#Cr7$
`a)` `200x + 35 = 235`
`200x = 235 - 35`
`200x = 200`
`x = 200 : 200`
`x = 1`
`→` Vậy `x = 1`
`b)` `30x + 80 = 240`
`30x = 240 - 80`
`30x = 160`
`x = 160 : 30`
`x = 16/3`
`→` Vậy `x = 16/3`
`200x` `+` `35` `=` `235`
`200x` `=` `235` `-` `35`
`200x` `=` `200`
`x` `=` `200` `÷` `200`
`x` `=` `1`
=================
`30x` `+` `80` `=` `240`
`30x` `=` `240` `-` `80`
`30x` `=` `160`
`x` `=` `160` `÷` `30`
`x` `=` `16/3`
