问题
解答题
解比例或方程: ①
②12÷(0.5x-1)=6. |
答案
(1)
=x 3.5
,x-16 1.5
3.5×(x-16)=1.5x,
3.5x-56=1.5x,
3.5x-56-1.5x=1.5x-1.5x,
2x-56+56=56,
2x÷2=56÷2,
x=28;
(2)12÷(0.5x-1)=6,
12÷(0.5x-1)×(0.5x-1)=6×(0.5x-1),
12=3x-6,
12+6=3x-6+6,
18÷3=3x÷3,
x=6.