问题
解答题
求未知数X
4x-1.43+3.57=10. |
答案
(1)
=x:0.4,3 4
4x=3×0.4,
4x=1.2,
4x÷4=1.2÷4,
x=0.3;
(2)4x-1.43+3.57=10,
4x-1.43+3.57+1.43=10+1.43,
4x+3.57-3.57=11.43-3.57,
4x=7.86,
4x÷4=7.86÷4,
x=1.965.
求未知数X
4x-1.43+3.57=10. |
(1)
=x:0.4,3 4
4x=3×0.4,
4x=1.2,
4x÷4=1.2÷4,
x=0.3;
(2)4x-1.43+3.57=10,
4x-1.43+3.57+1.43=10+1.43,
4x+3.57-3.57=11.43-3.57,
4x=7.86,
4x÷4=7.86÷4,
x=1.965.