Question

220 - 20 (x + 5) = 60

Answer 1

220 - 20 (x + 5) = 60

20.(x + 5) = 220 - 60

20.(x + 5) = 160

x + 5 = 160 : 20

x + 5 = 8

x = 8 - 5

x = 3

--T-T--

Answer 2

`220 -20(x+5)=60`

`=> 20(x+5)=220-60`

`=> 20(x+5) = 160`

`=> x+5=160:20`

`=> x+5=8`

`=> x=8-5`

`=>x=3`

Vậy `x=3`

Answer 3

\(220-20\left(x+5\right)=60\\ \Leftrightarrow-20\left(x+5\right)=220-60\\ \Leftrightarrow-20\left(x+5\right)=-160\\ \Leftrightarrow x+5=-160:\left(-20\right)\\ \Leftrightarrow x+5=8\\ \Leftrightarrow x=3\)