(1) x/2+1=11-3/2x 检验 (2)-2/3a=-1/4a+1检验 (3)7x+16=5x-2检验 急,求了!
问题描述:
(1) x/2+1=11-3/2x 检验 (2)-2/3a=-1/4a+1检验 (3)7x+16=5x-2检验 急,求了!
答
(1)x=5;
(2)-12/5;
(3)-9检验(1) x/2 + 1 = 11-3/2 xx/2 + 3/2 x = 11-12x = 10x = 5检验:x=5代入方程左边 = 5/2 + 1 = 7/2右边= 11 - 15/2 = 7/2左边=右边x=5是方程的解(2)(3)同理,过程略