Giúp e,cần gấp ak…….????????????
Mai e nộp rùi….
Giúp e,cần gấp ak…….???????????? Mai e nộp rùi….
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Giúp e,cần gấp ak…….????????????
Mai e nộp rùi….
Ladonna
Đáp án:
`e)`
` (4x-24) *27 = 0`
` => 4x – 24 = 0`
` => 4x = 24`
` => x =6`
`g)`
`(x-105):21 = 10`
` x -105 = 10.21`
` x -105 = 210`
` x =210 +105 = 315`
`h)`
` (x-5)(x-7)= 0`
TH1
` x -5 = 0=> x = 5`
` x – 7 = 0 => x =7`
`i)`
` 8x +7x = 165`
` 15x = 165`
` x= 165 : 15`
` x = 11`
Cherry
Đáp án:
`(4x-24).27=0 4`
`x-24=0:27`
`4x-24=0`
`4x=0+24`
`4x=24`
`x=24:4`
`x=6`
b
`(x-105):21=10`
`x-105=21.10`
`x-105=210`
`x=210+105`
`x=315`
c
`x-105:21=15`
`x-5=15`
`x=15+5`
`x=20`
d
`(x-5).(x-7)=0`
`x-5=0`
`⇒0+5=5 x-7=0`
`⇒ 0+7=7`
e
`8x+7x=165`
`15x=165`
`x=165:15`
`x=11`