4-2(x+1)=-x
<=>4-2x-2=-x
<=>-2x+x=-4+2
<=>-x =-2
<=>x=2
4-2(x+1)=-x
4 - 2x + 2 = -x
-2x + x = -2 -4
-x = -6
x = 6
hok tốt!
\(\text{4-2(x+1)=-x }\)
\(\Leftrightarrow4-2x-2=-x\)
\(\Leftrightarrow4-2x-2+x=0\)
\(\Leftrightarrow2-x=0\)
\(\Leftrightarrow x=2\)
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