(1) 5-6(5/6x-1/2)=2(x-3/4)解ï¼å»æ¬å·ï¼å¾ 5-5x+3=2x-3/2 移项ï¼å¾ -5x-2x=-3/2-5-3
å并ï¼å¾ -7x=-19/2 ç³»æ°å为1ï¼å¾ x=19/14 (2)5x-[1-(3+2xï¼]=7解ï¼å»æ¬å·ï¼å¾ 5x-1+3+2x=7 移 项ï¼å¾ 5x+2x=7+1-3 å 并ï¼å¾ 7x=5ç³»æ°åä¸ºä¸ ï¼å¾ x=5/7 ï¼3)å·²ç¥x=-2æ¯å
³äºxçæ¹ç¨1/2ï¼1-2axï¼=x+aç解ï¼æ±açå¼è§£ï¼ 1/2ï¼1-2axï¼=x+a 1/2-ax =x+a å½x=-2æ¶ï¼ -ax-x+a=-1/2 -aï¼-2ï¼-ï¼-2ï¼+a=-1/2 2a+2+a=-1/2 2a+a=-1/2-2 3a=-5/2 a=-5/6