5x=28-(x-0.8)*5 (3x+7)/5=2x-7 7(3x-1)/(2x+1)=8 18-3(5x-13)=4x 18x-5(2x+2)=20(x-1)-7(3x-4)
问题描述:
5x=28-(x-0.8)*5 (3x+7)/5=2x-7 7(3x-1)/(2x+1)=8 18-3(5x-13)=4x 18x-5(2x+2)=20(x-1)-7(3x-4)
5x=28-(x-0.8)*5(3x+7)/5=2x-7(3x-1)/(2x+1)=8 18-3(5x-13)=4x 18x-5(2x+2)=20(x-1)-7(3x-4)解方程有过程
答
20%x=5/3-x