解:解方程,此方程的解为x = 16/7
6x + 7x + 8x = 48
13x + 8x = 48
21x = 48
x = 48 ÷ 21
x = 48 × 1/21
x = 48/21
∴x = 16/7
答:此方程的解为x = 16/7
6x+7x+8x=48
解:合并同类项,得
21x=48
系数化为1,得
x=2.285714285714286