根据题意得: x△(2△3)=3 x△ (2 × 2 - 3)= 3 x△(4 - 3)= 3 x△1 = 3 2 x - 1 = 3 2 x = 3 + 1 2 x = 4 x = 4 ÷ 2 x = 2