2(3-x)=9 求x 4(x+0.5)+x=17求x
问题描述:
2(3-x)=9 求x 4(x+0.5)+x=17求x
答
2(3-x)=9 4(x+0.5)+x=173-X=9/2 4(x+0.5) =17-X 3-X=4.5 x+0.5=(17-X)/4 X=3-4.5 x=(17-X)/4-0.5X=-1.5 x=(17-x-4*0.5)/4x=(15-x)/4x=15-X*415-x*5=0x*5=15x=15/5x=3