题目内容
我会解方程.
x-40%x=42
120%x-x=24
(1-75%)x=1.
x-40%x=42
120%x-x=24
(1-75%)x=1.
(1)x-40%x=42,
60%x=42,
60%x÷60%=42÷60%,
x=70;
(2)120%x-x=24,
20%x=24,
20%x÷20%=24÷20%,
x=120;
(3)(1-75%)x=1,
25%x=1,
25%x÷25%=1÷25%,
x=4..
60%x=42,
60%x÷60%=42÷60%,
x=70;
(2)120%x-x=24,
20%x=24,
20%x÷20%=24÷20%,
x=120;
(3)(1-75%)x=1,
25%x=1,
25%x÷25%=1÷25%,
x=4..
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