e, ⇒2x-8=0
⇒2x=8
⇒x=4
f, ⇒\(\left[ \begin{array}{l}4-x\\x+3=0\end{array} \right.\) =>\(\left[ \begin{array}{l}x=4\\x=-3\end{array} \right.\)
Vậy x=4 hoặc x=-3
g, ⇒3(x-3).2.(x-3)=0
⇒x-3=0
⇒x=3
h, ⇒|x+3|+12=15
⇒|x+3|=3
⇒\(\left[ \begin{array}{l}x+3=3\\x+3=-3\end{array} \right.\) =>\(\left[ \begin{array}{l}x=0\\x=-6\end{array} \right.\)
Vậy x=0 hoặc x=-6
a) 2x+5=11-x
⇒2x+x=11-5
⇒3x=6
⇒x=2
b)25+2(x-4)=13
⇒2(x-4)=-12
⇒x-4=-6
⇒x=-2
c)x.(8-x)=0
⇒\(\left[ \begin{array}{l}x=0\\8-x=0\end{array} \right.\) =>\(\left[ \begin{array}{l}x=0\\x=8\end{array} \right.\)
Vậy x=0 hoặc x=8
d)|x+5|-3=4
⇒|x+5|=7
⇒\(\left[ \begin{array}{l}x+5=7\\x+5=-7\end{array} \right.\) =>\(\left[ \begin{array}{l}x=2\\x=-12\end{array} \right.\)
Vậy x=2 hoặc x=-12
