2(x-5)-3(x+7)=14
=> 2x-10-3x-21=14
=> x(2-3)-10-21=14
=> x.(-1)-31=14
=> -x=14+31
=> -x=45
=> x=-45
2 (x-5) -3 (x+7)=14
<=>2x-10-3x-21=14
<=>-x-31=14
<=>-x=45
<=>x=-45
\(2\left(x-5\right)-3\left(x+7\right)=14\)
\(2x-10-3x-21=14\)
\(-x=14+10+21\)
\(-x=45\)
\(x=-45\)
vay \(x=-45\)
nho k day
\(2\left(x-5\right)-3\left(x+7\right)=14\)
\(\Leftrightarrow2x-10-3x-21=14\)
\(\Leftrightarrow\left(2x-3x\right)-\left(10+21\right)=14\)
\(\Leftrightarrow-x=14+31\)
\(\Rightarrow x=-45\)
2(x-5)-3(x-7)=14
=> 2x-10-3x-21=14
=> x(2-3)-10-21=14
=> x.(-1)-31=14
=> -x=14+31
=>-x=45
=> x=-45
