3/5+x=2.70.6+x=2.7x=2.1
解:解方程, 此方程的解为x = 21/10,【即x = 2.1】 3/5 + x = 2.7 3/5 + x = (2×10+7)/10 3/5 + x = 27/10 x = 27/10 - 3/5 x = 27/10 - 6/10 x = 21/10 ∴x = 2.1 答:此方程的解为x = 21/10,【即x = 2.1】