2.5x+8=13.6?

2026-05-20 22:24:40
推荐回答(3个)
回答1:

解:解方程,此方程的解为x = 56/25,【即x = 2.24】
2.5x + 8 = 13.6

[(2×10+5)/10]x + 8 = (13×10+6)/10
(25/10)x + 8 = 136/10
(5/2)x + 8 = 68/5
(5/2)x = 68/5 - 8
(5/2)x = 68/5 - 40/5
(5/2)x = 28/5
x = 28/5 ÷ 5/2
x = 28/5 × 2/5
x = 56/25
∴x = 2.24
答:此方程的解为x = 56/25,【即x = 2.24】

回答2:

移项:2.5x=13.6-8
合并同类项:2.5x=5.6
化为系数1:ⅹ=2.24

回答3:

2.5x+8=13.6
解:2.5x=13.6-8
2.5x=5.6
x=5.6➗2.5
x=2.24