x-3(1-2x)=9解方程?

2025-06-28 05:19:58
推荐回答(1个)
回答1:

解:解方程, 此方程的解为x = 12/7
x - 3(1 - 2x)= 9
x - 3 × 1 + 3 × 2x = 9
x - 3 + 6x = 9
7x - 3 = 9
7x = 9 + 3
7x = 12
x = 12 ÷ 7
x = 12 × 1/7
∴x = 12/7
答:此方程的解为x = 12/7