Đáp án:
Giải thích các bước giải:
1) 575-(6x+70)=445
<=>575-6x-70=445
<=>-6x=445-575+70
<=>-6x=-60
<=>x=10
2) (x-36):18=12
<=>(x-36)=12*18
<=>x-36=216
<=>x=180
3) 3(x-2)+150=240
<=>3(x-2)=240-150
<=>3(x-2)=90
<=>x-2=90/3
<=>x-2=30
4)[3.(x+2):7].4=120
<=>[3(x+2):7]=30
<=>3(x+2)=210
<=>x+2=70
<=>x=68
5) 2480-4710:3+[200-(x-5]=1010
<=>2480-1570+[200-(x-5)]=1010
<=>200-(x-5)=100
<=>-x+5=-100
<=>-x=-105
<=>x=105