Question

(5x减七)除以三等于4.8？

Answer 1

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】

Answer 2

(5x－7)÷3＝4.8
5x－7＝4.8×3
5x－7＝14.4
5x＝14.4+7
5x＝21.4
x＝21.4÷5
x＝4.28

Answer 3

(5x—7)/3=4.8
5x—7=4.8*3
5x—7=14.4
5x=21.4
x=4.28

Answer 4

(5x-7)÷3=4.8
x=1.72

Answer 5

两边都乘以3，得5x-7=14.4,
5x=21.4,
x=4.28.