tìm x a,x+1/5-3/7=6/35 b,x*4+x/3=39 c,x*3-x/4=33 *đây là dấu nhân 12/07/2021 Bởi Aaliyah tìm x a,x+1/5-3/7=6/35 b,x*4+x/3=39 c,x*3-x/4=33 *đây là dấu nhân
Đáp án: a) x+15−37=635x+15-37=635 x+15=635+37x+15=635+37 x+15=35x+15=35 x=35−15x=35-15 x=25x=25 b) x×4+x3=39x×4+x3=39 x×4+x×13=39x×4+x×13=39 x×(4+13)=39x×(4+13)=39 x×133=39x×133=39 x=39:133x=39:133 x=9x=9 c) x×3−x4=33x×3-x4=33 x×3−x×14=33x×3-x×14=33 x×(3−14)=33x×(3-14)=33 x×114=33x×114=33 Bình luận
Đáp án: a) `x+1/5-3/7=6/35` `x+1/5=6/35+3/7` `x+1/5=3/5` `x=3/5-1/5` `x=2/5` b) `x\times4+x/3=39` `x\times4+x\times 1/3=39` `x\times(4+1/3)=39` `x\times13/3=39` `x=39:13/3` `x=9` c) `x\times3-x/4=33` `x\times3-x\times1/4=33` `x\times(3-1/4)=33` `x\times11/4=33` `x=33:11/4` `x=12` Bình luận
Đáp án:
a) x+15−37=635x+15-37=635
x+15=635+37x+15=635+37
x+15=35x+15=35
x=35−15x=35-15
x=25x=25
b) x×4+x3=39x×4+x3=39
x×4+x×13=39x×4+x×13=39
x×(4+13)=39x×(4+13)=39
x×133=39x×133=39
x=39:133x=39:133
x=9x=9
c) x×3−x4=33x×3-x4=33
x×3−x×14=33x×3-x×14=33
x×(3−14)=33x×(3-14)=33
x×114=33x×114=33
Đáp án:
a) `x+1/5-3/7=6/35`
`x+1/5=6/35+3/7`
`x+1/5=3/5`
`x=3/5-1/5`
`x=2/5`
b) `x\times4+x/3=39`
`x\times4+x\times 1/3=39`
`x\times(4+1/3)=39`
`x\times13/3=39`
`x=39:13/3`
`x=9`
c) `x\times3-x/4=33`
`x\times3-x\times1/4=33`
`x\times(3-1/4)=33`
`x\times11/4=33`
`x=33:11/4`
`x=12`