问题
解答题
求未知数x的值
(1)9:x=3:4
(2)x+50%x=45.
答案
(1)9:x=3:4,
3x=4×9,
3x=36,
3x÷3=36÷3,
x=12;
(2)x+50%x=45,
1.5x=45,
1.5x÷1.5=45÷1.5,
x=30.
求未知数x的值
(1)9:x=3:4
(2)x+50%x=45.
(1)9:x=3:4,
3x=4×9,
3x=36,
3x÷3=36÷3,
x=12;
(2)x+50%x=45,
1.5x=45,
1.5x÷1.5=45÷1.5,
x=30.