\(a,-4\left(2x+9\right)=\left(-8x+3\right)\)
\(\Rightarrow-8x-36=-8x+3\)
\(\Rightarrow-8x+8x=3+36\)
\(\Rightarrow0x=39\left(vô-lí\right)\)
\(b,1+x-2\left(5+3x\right)=4-5x\)
\(\Rightarrow1+x-10-6x=4-5x\)
\(\Rightarrow x-6x+5x=4+10-1\)
\(\Rightarrow0x=13\left(vô-lí\right)\)
\(c,3\left(2-x\right)+1=-3x+7\)
\(\Rightarrow6-3x+1=-3x+7\)
\(\Rightarrow-3x+3x=7-1-6\)
\(\Rightarrow0x=0\Rightarrow x=0\)