 
<translate> Ka X bụrụ ebe Sam gbara ọsọ. Ije ije ya n'ụlọ ahịa ahụ ji okpukpu abụọ karịa ebe ọ na-agba ọsọ, ya mere ije ya bụ 2X. Ọ gbara ịnyịnya ígwè ruo kilomita iri na abụọ ma gaa kilomita iri abụọ na asatọ, ya mere, ọ gara ije ma gbaa ọsọ 18 - 12 = kilomita isii. N'ihi ya, ije na ịgba ọsọ ya bụ X + 2X = 3X = kilomita 6. N'ihi ya, ọ gbara ọsọ X = 6 / 3 = kilomita abụọ. Ya mere azịza ya bụ 2. <eng> Let X be the distance Sam ran. His walk through the store was twice the distance of his run, so his walk was 2X. He biked for 12 miles and went 18 miles in all, so he walked and ran 18 - 12 = 6 miles. Thus, his walk and run together were X + 2X = 3X = 6 miles. Thus, he ran X = 6 / 3 = 2 miles. So the answer is 2. 