(0.1x-0.3)/0.03=(2x+1)/0.2+1.2
问题描述:
(0.1x-0.3)/0.03=(2x+1)/0.2+1.2
答
100(0.1x-0.3)/3=10(2x+1)/2+1.2
(10x-30)/3=5(2x+1)+1.2
10x-30=15(2x+1)+3.6
10x-30=30x+15+3.6
20x=-48.6
x=-2.43