Question

已知3个圆形加2个三角形等于5.4,3个三角形加2个圆形等于5.6求圆形是多少,三角形是多少

Answer 1

列方程组啊！
设圆形是x,三角形是y
依题意有
(1)3x+2y=5.4
(2)2x+3y=5.6
解得
x=1,y=1.2

Answer 2

3〇+2△=5.4 3△+2〇=5.6
把上面2个左右对应加起来，得到 5〇+5△ = 5.4+5.6 = 11，那么1〇+1△ = 11÷5 = 2.2
2〇+2△ = 2.2×2 = 4.4
1〇 = (3〇+2△)-(2〇+2△) = 5.4-4.4 = 1
1△ = (3△+2〇)-(2〇+2△) = 5.6-4.4 = 1.2