问题
解答题
求未知数 (1)
(2)3×0.7+4x=6.5. |
答案
(1)
:1 3
=1 20
:x5 9
x=1 3
×1 20 5 9
x÷1 3
=1 3
÷1 36 1 3
x=
;1 12
(2)3×0.7+4x=6.5
2.1+4x-2.1=6.5-2.1
4x÷4=4.4÷4
x=1.1.
求未知数 (1)
(2)3×0.7+4x=6.5. |
(1)
:1 3
=1 20
:x5 9
x=1 3
×1 20 5 9
x÷1 3
=1 3
÷1 36 1 3
x=
;1 12
(2)3×0.7+4x=6.5
2.1+4x-2.1=6.5-2.1
4x÷4=4.4÷4
x=1.1.