Question

Answer 1

`x-23=67`

`=>x=67+23`

`=>x=90`

Vậy `x=90`

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`57 +7x=120`

`=> 7x=120-57`

`=>7x=63`

`=>x=63:7`

`=>x=9`

vậy `x=9`

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`38-2x=14`

`=>2x=38-14`

`=>2x=  24`

`=>x=24:2`

`=>x=12`

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`140:(x-8)=7`

`=> x-8=140:7`

`=>x-8=20`

`=>x=20+8`

`=>x=28`

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`(2+x):5=6`

`=>2+x=6xx5`

`=>2+x=30`

`=>x=30-2`

`=>x=28`

Vậy `x=28`

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`2(x-51)=24`

`=>x-51=24:2`

`=>x-51= 12`

`=>x=12+51`

`=>x=63`

Vậy `x=63`

Answer 2

\(a)x-23=67\\\Rightarrow x=67+23\\\Rightarrow x=90\\---\\b)57+7x=120\\\Rightarrow 7x=120-57\\\Rightarrow7x=63\\\Rightarrow x=63:7\\\Rightarrow x=9\\---\\c)38-2x=14\\\Rightarrow 2x=38-14\\\Rightarrow 2x=24\\\Rightarrow x=24:2\\\Rightarrow x=12\\---\)

\(f)140:(x-8)=7\\\Rightarrow x-8=140:7\\\Rightarrow x-8=20\\\Rightarrow x=20+8\\\Rightarrow x=28\\---\\g)(2+x):5=6\\\Rightarrow 2+x=6\cdot5\\\Rightarrow 2+x=30\\\Rightarrow x=30-2\\\Rightarrow x=28\)

#\(Toru\)