1/ $-2x-(x-17)=34-(-x+25)$
→ $-2x-x+17=34+x-25$
→ $-2x-x-x=34-25-17$
→ $-4x=-8$
→ $x=2$
Vậy $x=2$
2/ $17x-(-16x-37)=2x+43$
→ $17x+16x+37=2x+43$
→ $17x+16x-2x=43-37$
→ $31x=6$
→ $x=\frac{6}{31}$
Vậy...
3/ $-2x-3(x-17)=34-2(-x+25)$
→ $-2x-3x+51=34+2x-50$
→ $-2x-3x-2x=34-50-51$
→ $-7x=-67$
→ $x=\frac{67}{7}$
Vậy...
4/ $17x+3(-16x-37)=2x+43-4x$
→ $17x-48x-111=2x+43-4x$
→ $17x-48x-2x+4x=43+111$
→ $-29x=154$
→ $x=\frac{-154}{29}$
Vậy...
5/ ${-3x+2[45-x-3(3x+7)-2x]+4x}=55-103$
→ ${-3x+2[45-x-9x-21-2x]+4x}=-48$
→ ${-3x+2[24-12x]+4x}=-48$
→ $-3x+48-24x+4x=-48$
→ $-23x=-48-48$
→ $-23x=-96$
→ $x=\frac{96}{23}$
Vậy...
6/ $-57:[-2(2x-1)^2-(-9)^0]=-106$
→ $-2(2x-1)^2-1=\frac{57}{106}$
→ $-2(2x-1)^2=\frac{163}{106}$
→ $(2x-1)^2=\frac{-163}{212}$
→ Không có giá trị nào của x thỏa mãn đề bài.