x+×/3=80×+×=80.32x=240x=240÷2×=120
X+x/3=80/×33×X+3×x/3=80×33x+x=2404x=240X=240/4X=60
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x+×/3=80
×+×=80.3
2x=240
x=240÷2
×=120
X+x/3=80/×3
3×X+3×x/3=80×3
3x+x=240
4x=240
X=240/4
X=60