1. 解方程:
(1) $2x - \frac{4}{5}x = 1.3 + 0.5$;
(2) $x + \frac{4}{3} = \frac{1}{3}x - 2$;
(3) $6x - 2(1 - x) = 6$;
(4) $\frac{3y - 6}{4} - 1 = \frac{5y - 7}{3}$;
(5) $\frac{3y - 1}{2} - \frac{5y + 1}{3} = 1 - \frac{7y + 1}{6}$。
(1) $2x - \frac{4}{5}x = 1.3 + 0.5$;
(2) $x + \frac{4}{3} = \frac{1}{3}x - 2$;
(3) $6x - 2(1 - x) = 6$;
(4) $\frac{3y - 6}{4} - 1 = \frac{5y - 7}{3}$;
(5) $\frac{3y - 1}{2} - \frac{5y + 1}{3} = 1 - \frac{7y + 1}{6}$。
答案
(1) 解:$x = \frac{3}{2}$.
(2) 解:$x = -5$.
(3) 解:$x = 1$.
(4) 解:$y = -\frac{2}{11}$.
(5) 解:$y = \frac{5}{3}$.
(2) 解:$x = -5$.
(3) 解:$x = 1$.
(4) 解:$y = -\frac{2}{11}$.
(5) 解:$y = \frac{5}{3}$.
2. 解方程:$\frac{3}{2}[\frac{2}{3}(\frac{x}{4}-1)-2]-x=2$
答案
解:$x = -8$.
3. 解方程:$2[\dfrac{4}{3}x - (\dfrac{2}{3}x - \dfrac{1}{2})] = \dfrac{3}{4}x.$
答案
解:$x = -\frac{12}{7}$.
4. 解方程:$\frac{4 - 6x}{0.01} - 6.5 = \frac{0.02 - 2x}{0.02} - 7.5$
答案
解:$x = \frac{4}{5}$.
5. 解方程:$\frac{4x - 1.5}{0.5} - \frac{5x - 0.8}{0.2} = \frac{1.2 - x}{0.1} + 3.$
答案
解:$x = -2$.
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