2026年计算100七年级数学上册苏科版第83页答案
解下列方程:
(1) $\frac{5}{2}x + 4 = \frac{3}{2}x - 2$;
(2) $0.5x - 0.7 = 6.5 - 1.5x$;
(3) $30\%x + 1 = 51\% + x$;
(4) $\frac{1}{2}x - 6 = \frac{3}{4}x - 1$;
(5) $\frac{2}{5}x - 8 = 0.25 - 0.2x$;
(6) $2 - 40\%x = 0.5x - 4$;
(7) $12\%x - 7\% = 9\%x - \frac{1}{5}$;
(8) $\frac{2}{7}x - \frac{3}{5} + \frac{3}{2}x = \frac{x}{14} - 2$;
(9) $35\%x + 360 = \frac{3}{4}x + 40$;
(10) $\frac{1}{3}x - 4 + \frac{2}{5}x = 0.75x - 1$。

答案

(1)$x=-6$
(2)$x=3.6$
(3)$x=0.7$
(4)$x=-20$
(5)$x=\frac{55}{4}$(或13.75)
(6)$x=\frac{20}{3}$
(7)$x=-\frac{13}{3}$
(8)$x=-\frac{49}{60}$
(9)$x=800$
(10)$x=-180$