> 数学 >
“未来世界”我求解
40%x-3.6×
3
4
=1.3

3×(x-
1
3
)=8.
人气:138 ℃ 时间:2020-04-05 06:04:19
解答

(1)40%x-3.6×
3
4
=1.3,
         40%x-2.7=1.3,
     40%x-2.7+2.7=1.3+2.7,
             40%x=4,
        40%x÷40%=4÷40%,
                x=10;
(2)3×(x-
1
3
)=8,
  3×(x-
1
3
)÷3=8÷3,
            x-
1
3
=
8
3

         x-
1
3
+
1
3
=
8
3
+
1
3

               x=3.
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