解:解方程
題一:
x - 2.5 = 4.3
x - (2×10+5)/10 = (4×10+3)/10
x - 25/10 = 43/10
x = 43/10 + 25/10
x = 68/10
x = 34/5
∴x = 6.8
答:此方程的解為x = 6.8
題二:
2.3(x-2.5)=2.76
2.3x - 23/4 = 69/25
(23/10)x = 69/25 + 23/4
(23/10)x = 276/100 + 92/100
(23/10)x = 851/100
x = 851/100 ÷ 23/10
x = 37/10
∴x = 3.7
答:此方程的解為x = 3.7
解:解方程
題一:
x - 2.5 = 4.3
x - (2×10+5)/10 = (4×10+3)/10
x - 25/10 = 43/10
x = 43/10 + 25/10
x = 68/10
x = 34/5
∴x = 6.8
答:此方程的解為x = 6.8
題二:
2.3(x-2.5)=2.76
2.3x - 23/4 = 69/25
(23/10)x = 69/25 + 23/4
(23/10)x = 276/100 + 92/100
(23/10)x = 851/100
x = 851/100 ÷ 23/10
x = 37/10
∴x = 3.7
答:此方程的解為x = 3.7