解方程:
(1)$5x+21=7-2x$; (2)$-\frac {1}{2}x=-\frac {3}{2}x+2$; (3)$2x-1=x+3$;
(4)$\frac {1}{2}x-6=\frac {3}{4}x$; (5)$x-2=5+\frac {1}{2}x$; (6)$8x-3=5x+3$;
(7)$2x+3=11-6x$; (8)$4x-3=\frac {9}{2}x+1$;
(9)$3+8x=14-x$; (10)$5y+5=9-3y$。
(1)$5x+21=7-2x$; (2)$-\frac {1}{2}x=-\frac {3}{2}x+2$; (3)$2x-1=x+3$;
(4)$\frac {1}{2}x-6=\frac {3}{4}x$; (5)$x-2=5+\frac {1}{2}x$; (6)$8x-3=5x+3$;
(7)$2x+3=11-6x$; (8)$4x-3=\frac {9}{2}x+1$;
(9)$3+8x=14-x$; (10)$5y+5=9-3y$。
答案:
(1)x=-2
(2)x=2
(3)x=4
(4)x=-24
(5)x=14
(6)x=2
(7)x=1
(8)x=-8
(9)x=$\frac{11}{9}$
(10)y=0.5
(1)x=-2
(2)x=2
(3)x=4
(4)x=-24
(5)x=14
(6)x=2
(7)x=1
(8)x=-8
(9)x=$\frac{11}{9}$
(10)y=0.5
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