Question

[nguyen phuong thuy]

[x+2] + [x+4] + [x+6] + [x+8] + x = 120

Answer 1

[Quỳnh Nguyễn]

(x+2)+(x+4)+(x+6)+(x+8)+x=120

(x+x+x+x+x)+(2+4+6+8)=120

5x+20=120

5x=120-20

5x=100

x=100:5

x=20  

Vậy x=20

Answer 2

[ღHàn Thiên Băng ღ]

\(\left(x+2\right)+\left(x+4\right)+\left(x+6\right)+\left(x+8\right)+x=120\)

\(\left(x+x+x+x+x\right)+\left(2+4+6+8\right)=120\)

\(x.5+20=120\)

\(x.5=120-20\)

\(x.5=100\)

\(x=100:5\)

\(x=20\)