2.
\(4x-1=6x-3\Rightarrow x=1\)
\(x-1=9\Rightarrow x=10\)
\(4x+5=4x+8\) — решений нет.
\(x+4=14\Rightarrow x=10\)
\(3x-4=8\Rightarrow x=4\)
\(2{,}8-1{,}5x=-0{,}8x-0{,}8\Rightarrow x=\frac{36}{7}\)
\(x-2=10\Rightarrow x=12\)
\(2x+3=17\Rightarrow x=7\)
\(6{,}7x-0{,}2=3x-3\Rightarrow x=-\frac{28}{37}\)
3. Например:
\[ 4x-(x+2)=10\Rightarrow x=4 \]
\[ 6x-(2x-3)=15\Rightarrow x=3 \]
\[ 0{,}5x-(0{,}2x+1)=5\Rightarrow x=20 \]
