解:解方程,此方程的解为x = 318/5,【即x = 63.6】
(1/12)x + 百分之120 = 6.5
(1/12)x + 120/100 = (6×10+5)/10
(1/12)x + 6/5 = 65/10
(1/12)x = 13/2 - 6/5
(1/12)x = 65/10 - 12/10
(1/12)x = 53/10
x = 53/10 ÷ 1/12
x = 53/10 × 12
x = 318/5
∴x = 63.6
答:此方程的解为x = 318/5,【即x = 63.6】