问题
解答题
解方程.
x+2
x-(1
37.5+
|
答案
(1)
-x=10 11 2 3
x=
-10 11 2 3
x=
-30 33 22 33
x=
;8 33
(2)x+2
=4.257 12
x=4.25-27 12
x=4
-23 12 7 12
x=3
-215 12 7 12
x=1
;2 3
(3)x-(1
+2 3
)=4.51 6
x-(1
+4 6
)=4.51 6
x-1
=4.55 6
x=4.5+15 6
x=4
+11 2 5 6
x=4
+13 6 5 6
x=6
;1 3
(4)37.5+
+x=691 5 1 2
37.5+0.2+x=69.5
37.7+x=69.5
x=69.5-37.7
x=31.8.