问题
解答题
解方程. 5.4x+2.6x=840
8x-
|
答案
(1)5.4x+2.6x=840,
8x=840,
8x÷8=840÷8,
x=105;
(2)
x=30,5 6
x×5 6
=30×6 5
,6 5
x=36;
(3)8x-
=1 3
,1 9
8x-
+1 3
=1 3
+1 9
,1 3
8x÷8=
÷8,4 9
x=
.1 18