Question

X+X/3=80 RESOLVERLO

Answer 1

x+×/3=80
×+×=80.3
2x=240
x=240÷2
×=120

Answer 2

X+x/3=80/×3
3×X+3×x/3=80×3
3x+x=240
4x=240
X=240/4
X=60