80道初一元一次方程
问题描述：
80道初一元一次方程
答
3x(-9)+7x(-9) (-54)x1/6x(-1/3)x/3 -5 = (5-x)/2 2(x+1) /3=5(x+1) /6 -1 (1/5)x +1 =(2x+1)/4 (5-2)/2 - (4+x)/3 =1 x/3 -1 = (1-x)/2 (x-2)/2 - (3x-2)/4 =-1 (5y+1)+(1-y)=(9y+1)+(1-3y) 7(2x-1)-3(4x-1)=4(3x+2...