问题 解答题
解比例或方程:
x
3.5
=
x-16
1.5

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.

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