问题
解答题
解方程.
(1)(1-25%)x=72
(2)x-40%x=5.04
(3)x÷(1-40%)=3.6
(4)34x-25%x=12.
答案
(1)(1-25%)x=72,
75%x=72,
75%x÷75%=72÷75%,
x=96;
(2)x-40%x=5.04,
60%x=5.04,
60%x÷60%=5.04÷60%,
x=8.4;
(3)x÷(1-40%)=3.6,
x÷60%=3.6,
x÷60%×60%=3.6×60%,
x=2.16;
(4)34x-25%x=12,
33.75x=12,
33.75x÷33.75=12÷33.75,
x=
.16 45