解方程：①5x-3×7/10=7/5 ②0.6×（3.5-x）=1.2
问题描述：
解方程：①5x-3×7/10=7/5 ②0.6×（3.5-x）=1.2
答
①5x-3×7/10=7/5
5x-21/10=7/5
5x=7/2
x=7/10
②0.6×（3.5-x）=1.2
3.5-x=2
x=3.5-2
x=1.5