575 – (6x+70)=445
(x-36):18=12
3.(x-2)+150=240
[3.(x+2):7].4=120
2480-4710:3+[200-(x-5]=1010
575 – (6x+70)=445 (x-36):18=12 3.(x-2)+150=240 [3.(x+2):7].4=120 2480-4710:3+[200-(x-5]=1010
By Hailey
By Hailey
575 – (6x+70)=445
(x-36):18=12
3.(x-2)+150=240
[3.(x+2):7].4=120
2480-4710:3+[200-(x-5]=1010
a) `575-(6x+70)=445`
`⇒ 6x+70=575-445`
`⇒ 6x+70=130`
`⇒ 6x=130-70=60`
`⇒ x=60÷6=10`
b) `(x-36)÷18=12`
`⇒ x-36=12.18`
`⇒ x-36=216`
`⇒ x=216+36`
`⇒ x=252`
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