B)\(\frac{11}{2}+x=\frac{3}{2}-7\)
\(\frac{11}{2}+x=\frac{3}{2}-\frac{14}{2}\)
\(\frac{11}{2}+x=\frac{-11}{2}\)
\(x=\frac{-11}{2}-\frac{11}{2}\)
\(x=\frac{-22}{2}\)
\(x=-11\)
A)\(\frac{1}{3}x+\frac{2}{5}\left(x+1\right)=0\)
\(\frac{1}{3}x+\frac{2}{5}x+\frac{2}{5}=0\)
\(x\cdot\left(\frac{1}{3}+\frac{2}{5}\right)=0-\frac{2}{5}\)
\(x\cdot\left(\frac{5}{15}+\frac{6}{15}\right)=-\frac{2}{5}\)
\(x\cdot\frac{11}{15}=\frac{-2}{5}\)
\(x=\frac{-2}{5}:\frac{11}{5}\)
\(x=\frac{-2}{11}\)
nhớ k cho mình nha
a) 1/3 x + 0,4 ( x + 1 ) = 0
<=> 1/3 x + 0,4 . x + 0,4 . 1 = 0
<=> 1/3 x + 0,4 x + 0,4 = 0
<=> x. ( 1/3 + 0,4 ) + 0,4 = 0
<=> x. 11/15 + 0.4 = 0
<=> x. 11/15 = -2/5
<=> x = -2/5 : 11/15 = - 6/11
b) 1 1/2 + x = 3/2 -7
<=> 3/2 + x = -11/2
<=> x = -11/2 - 3/2
<=> x = -7 < GOOD LUCK >
