\(\left(1\right)8x-3=6x+11\)
\(\Leftrightarrow2x=14\)
\(\Leftrightarrow x=7\)
Vậy ...
\(\left(2\right)7-\left(2x+4\right)=-\left(x+4\right)\)
\(\Leftrightarrow7-2x-4=-x-4\)
\(\Leftrightarrow x=7\)
Vậy ...
\(\left(3\right)\dfrac{7x-1}{6}+2x=\dfrac{16-x}{5}\)
\(\Leftrightarrow5\left(7x-1\right)+60x=6\left(16-x\right)\)
\(\Leftrightarrow35x-5+60x=96-6x\)
\(\Leftrightarrow101x=101\)
\(\Leftrightarrow x=1\)
`1)8x-3=6x+11`
`<=>8x-6x=11+3`
`<=>2x=14`
`<=>x=7`
Vậy `S = {7}`
______________________________
`2)7-(2x+4)=-(x+4)`
`<=>7-2x-4=-x-4`
`<=>2x-x=7-4+4`
`<=>x=7`
Vậy `S = {7}`
______________________________
`3)[7x-1]/6+2x=[16-x]/5`
`<=>[5(7x-1)]/30+[60x]/30=[6(16-x)]/30`
`<=>35x-5+60x=96-6x`
`<=>35x+60x+6x=96+5`
`<=>101x=101`
`<=>x=1`
Vậy `S = {1}`
