第85页

信息发布者:
1或4或13
解:$3x + 7 = 32 - 2x$
移项得:$3x + 2x = 32 - 7$
合并同类项得:$5x = 25$
系数化为$1$得:$x = 5$
解:$\frac{3y - 1}{4} - 1 = \frac{5y - 7}{6}$
去分母得:$3(3y - 1) - 12 = 2(5y - 7)$
去括号得:$9y - 3 - 12 = 10y - 14$
移项得:$9y - 10y = -14 + 3 + 12$
合并同类项得:$-y = 1$
系数化为$1$得:$y = -1$
解:去括号,得 $60 - 3y = 6y - 4y + 44$
移项,得 $-3y - 6y + 4y = 44 - 60$
合并同类项,得 $-5y = -16$
系数化为1,得 $y = \dfrac{16}{5}$
解:移项,得 $5(x+\dfrac{1}{2}) - 7(x+\dfrac{1}{2}) = -13 + 9$
合并同类项,得 $-2(x+\dfrac{1}{2}) = -4$
两边同除以$-2,$得 $x + \dfrac{1}{2} = 2$
移项计算,得 $x = \dfrac{3}{2}$