解:解方程(此方程的解为x = 0.36)
2.7 × 2 - 15x = 0
(2×10 + 7)/10 × 2 - 15x = 0
27/10 × 2 - 15x = 0
27/5 - 15x = 0
15x = 27/5
x = 27/5 ÷ 15
x = 27/5 × 1/15
x = 9/25
∴x = 0.36
答:此方程的解为x = 0.36
15x=5.4
x=0.36
解:2.7×2-15x=0,15x=5.4,x=0.36
0.36