问题
解答题
|
答案
(1)2x+1=6
2x+1-1=6-1
2x=5
2x÷2=5÷2
x=2.5;
(2)13x+5x=5.4
18x=5.4
18x÷18=5.4÷18
x=0.3;
(3)x+
=0.41 5
x+0.2=0.4
x+0.2-0.2=0.4-0.2
x=0.2;
(4)
+x=4 7 7 10
+x-4 7
=4 7
-7 10 4 7
x=
.9 70
|
(1)2x+1=6
2x+1-1=6-1
2x=5
2x÷2=5÷2
x=2.5;
(2)13x+5x=5.4
18x=5.4
18x÷18=5.4÷18
x=0.3;
(3)x+
=0.41 5
x+0.2=0.4
x+0.2-0.2=0.4-0.2
x=0.2;
(4)
+x=4 7 7 10
+x-4 7
=4 7
-7 10 4 7
x=
.9 70