3X+(X+1.2)*5=42.20

分类: 作业答案 • 2022-01-09 18:03:57

问题描述：

3X+(X+1.2)*5=42.20

答

3X+(X+1.2)*5=42.20
3x + 5x + 1.2 × 5 = 42.20
8x + 6 = 42.20
8x = 42.20 - 6
8x = 34.20
x = 4.275