a)56-(x+5):2=40
(x+5):2=56-40
(x+5):2=16
x+5=16:2
x+5=8
x=8-5
x=3
Vậy x=3
b)|x+2|=33
|x+2|=27
\(\Rightarrow\orbr{\begin{cases}x+2=27\\x+2=-27\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=27-2=25\\x=-27-2=-29\end{cases}}\)
Vậy x = 25 hoặc x = -29
\(a,56-\left(x+5\right):2=40\)
\(56-\left(x+5\right)=80\)
\(x+5=-24\Leftrightarrow x=-29\)
\(b,|x+2|=3^3\)
\(|x+2|=27\)
\(Th1:x+2=27\Leftrightarrow x=25\)
\(Th2:x+2=-27\Leftrightarrow x=-29\)
a)56-(x+5):2=40\(\Leftrightarrow\)(x+5):2=16\(\Leftrightarrow\)x+5=32\(\Leftrightarrow\)x=27
b)\(|x+2|\)=33\(\Leftrightarrow|x+2|=27\)\(\Leftrightarrow\orbr{\begin{cases}x+2=27\\x+2=-27\end{cases}}\)\(\Leftrightarrow\orbr{\begin{cases}x=25\\x=-29\end{cases}}\)
a,\(56-\left(x+5\right):2=40\)
\(=>\left(x+5\right):2=56-40=16\)
\(=>\frac{\left(x+5\right)}{2}=\frac{32}{2}\)
\(=>x+5=32\)
\(=>x=27\)
b,\(\left|x+2\right|=3^3\)
\(=>\left|x+2\right|=27\)
\(=>\orbr{\begin{cases}x+2=27\\x+2=-27\end{cases}=>\orbr{\begin{cases}x=27-2\\x=-27-2\end{cases}}}\)
\(=>\orbr{\begin{cases}x=25\\x=-29\end{cases}}\)
a)56-(x+5):2=40 b)|x+2|=33
( x + 5 ) : 2 = 16 |x+2|=27
x + 5 = 32 x + 2 = 27 hoặc x + 2 = - 27
x = 27 x = 25 x = - 29
Vậy x = { 25 ; - 29 }
\(56-\left(x+5\right):2=40\)
\(\Leftrightarrow\left(x+5\right):2=16\)
\(\Leftrightarrow x+5=32\)
\(\Leftrightarrow x=27\)
Chúc bạn học tốt~~
