(5x减七)除以三等于4.8?
1个回答
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解:解方程,
此方程的解为x
=
107/25,【即x
=
4.28】
(5x减七)除以三等于4.8
(5x
-
7)÷
3
=
4.8
(5x
-
7)÷
3
=
(4×10+8)/10
(5x
-
7)÷
3
=
48/10
(5x
-
7)÷
3
=
24/5
5x
-
7
=
24/5
×
3
5x
-
7
=
72/5
5x
=
72/5
+
7
5x
=
72/5
+
35/5
5x
=
107/5
x
=
107/5
÷
5
x
=
107/5
×
1/5
x
=
107/25
∴x
=
4.28
答:此方程的解为x
=
107/25,【即x
=
4.28】
此方程的解为x
=
107/25,【即x
=
4.28】
(5x减七)除以三等于4.8
(5x
-
7)÷
3
=
4.8
(5x
-
7)÷
3
=
(4×10+8)/10
(5x
-
7)÷
3
=
48/10
(5x
-
7)÷
3
=
24/5
5x
-
7
=
24/5
×
3
5x
-
7
=
72/5
5x
=
72/5
+
7
5x
=
72/5
+
35/5
5x
=
107/5
x
=
107/5
÷
5
x
=
107/5
×
1/5
x
=
107/25
∴x
=
4.28
答:此方程的解为x
=
107/25,【即x
=
4.28】
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