问题
解答题
解方程. (1)
(2)x-
(3)
|
答案
(1)
x+1 2
x=2 5 81 100
x=9 10 81 100
x÷9 10
=9 10
÷81 100 9 10
x=
;9 10
(2)x-
x=283 7
x=284 7
x÷4 7
=28÷4 7 4 7
x=49;
(3)
-2x=15 16 1 4
-2x+2x=15 16
+2x1 4
-15 16
=1 4
+2x-1 4 1 4
÷2=2x÷211 16
x=
.11 32