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(1)23x+12x=42(2)x10=0.84.5.

题目详情
(1)
2
3
x+
1
2
x=42
(2)
x
10
=
0.8
4.5
▼优质解答
答案和解析
(1)
2
3
x+
1
2
x=42,
      (
2
3
+
1
2
)x=42,
            
7
6
x=42,
         
7
6
6
7
=42×
6
7

               x=36;

(2)
x
10
=
0.8
4.5

      4.5x=8,
4.5x÷4.5=8÷4.5,
        x=
16
9