问题
解答题
解下列方程: (1)
(2)x÷(1-20%)=1.15. |
答案
(1)
x-1=3 2
,3 2
x-1+1=3 2
+1,3 2
x=3 2
,5 2
x÷3 2
=3 2
÷5 2
,3 2
x=1
;2 3
(2)x÷(1-20%)=1.15,
x÷0.8=1.15,
x÷0.8×0.8=1.15×0.8,
x=0.92.
解下列方程: (1)
(2)x÷(1-20%)=1.15. |
(1)
x-1=3 2
,3 2
x-1+1=3 2
+1,3 2
x=3 2
,5 2
x÷3 2
=3 2
÷5 2
,3 2
x=1
;2 3
(2)x÷(1-20%)=1.15,
x÷0.8=1.15,
x÷0.8×0.8=1.15×0.8,
x=0.92.