问题
解答题
解方程
2.4X-X=28
7X-1.5×0.28=7.
答案
(1)2.4x-x=28,
1.4x=28,
1.4x÷1.4=28÷1.4,
x=20;
(2)7x-1.5×0.28=7,
7x-0.42=7,
7x-0.42+0.42=7+0.42,
7x÷7=7.42÷7,
x=1.06.
解方程
2.4X-X=28
7X-1.5×0.28=7.
(1)2.4x-x=28,
1.4x=28,
1.4x÷1.4=28÷1.4,
x=20;
(2)7x-1.5×0.28=7,
7x-0.42=7,
7x-0.42+0.42=7+0.42,
7x÷7=7.42÷7,
x=1.06.