第88页

信息发布者：
D
A
D
6(x - 1) - 4(x + 1) + 1 = 0
-1
解：去分母，得$6x - (1 - x) = 6，$去括号，得$6x - 1 + x = 6，$移项，得$6x + x = 6 + 1，$合并同类项，得$7x = 7，$系数化为1，得$x = 1$
解：去分母，得$5(2x + 1) - 4(3x - 1) = 20，$去括号，得$10x + 5 - 12x + 4 = 20，$移项，得$10x - 12x = 20 - 5 - 4，$合并同类项，得$-2x = 11，$系数化为1，得$x = -\frac{11}{2}$
解：去分母，得$4m - 3(m - 1) = 24 - (m + 1)，$去括号，得$4m - 3m + 3 = 24 - m - 1，$移项，得$4m - 3m + m = 24 - 1 - 3，$合并同类项，得$2m = 20，$系数化为1，得$m = 10$
解：去分母，得$6 - 2(2x + 1) = 3(1 + x)，$去括号，得$6 - 4x - 2 = 3 + 3x，$移项，得$-4x - 3x = 3 - 6 + 2，$合并同类项，得$-7x = -1，$系数化为1，得$x = \frac{1}{7}$
B
C
上一页 下一页