\(8+4(x-2)=-10-x\)
\(8+4x-8=-10-x\)
\(4x=-10-x\)
\(5x=-10\)
\(x=-2\)
\(2(5-2x)-(x+1)=-6\)
\(10-4x-x-1=-6\)
\(9-5x=-6\)
\(-5x=-15\)
\(x=3\)
\(3-7x=-5(x+3)\)
\(3-7x=-5x-15\)
\(-7x+5x=-15-3\)
\(-2x=-18\)
\(x=9\)
Ответ: 1) \(x=-2\); 2) \(x=3\); 3) \(x=9\).