Đáp án+Giải thích các bước giải:
`2x + 3(3x - 4) = 0`
`⇒ 2x + 9x - 12 = 0`
`⇒ 11x - 12 = 0`
`⇒ 11x - 12 + 12 = 0 + 12`
`⇒ 11x = 12`
`⇒ 11x/11 = 12/11`
`⇒ x = 12/11`
Vậy `x = 12/11`
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`1463 : 926`
`= 1463/926`
`~~` `1,58`
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`980 × 2 : 2/3`
`= 1960 : 2/3`
`= 1960 × 3/2`
`= 2940`
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`673 - 3 : 22 `
`= 673 - 3/22`
`= 673 - 0,14`
`~~` `672,86`
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`12 × 3 - 210 + 101`
`= 36 - 210 + 101`
`= -174 + 101`
`= -73`