Question

9(x+4.3)＝45×2怎么解方程？

9(x+4.3)＝45×2怎么解方程

Answer 1

解：解方程, 此方程的解为x = 513/900，【即x = 5.7】
9(x+4.3)＝45×2
9x + 9 × 4.3 = 90
9x + 9 × （4×10+3）/10 = 90
9x + 9 × 43/10 = 90
9x + 387/10 = 900/10
9x = 900/10 - 387/10
9x = 513/10
x = 513/10 ÷ 9
x = 513/10 × 1/9
x = 513/90
∴x = 5.7
答：此方程的解为x = 513/900，【即x = 5.7】

Answer 2

9(x+4.3)＝45×2
9(x+4.3)＝90
x+4.3＝10
x=5.7

Answer 3

9(x＋4.3)＝90
x＋4.3＝10
x=5.7

Answer 4