點計呢條數ar??(10分)

指數方程 (exponential equation)
5x+1 = 100+5x
5x‧51 = 100+5x
5(5x)﹣5x = 100
(5﹣1)5x = 100
4(5x) = 100
5x = 100 / 4
5x = 25
5x = 52
x = 2
註：「‧」符號等於乘



2006-11-13 18:26:35 補充：
↓左方4(5x)中的4，因為是乘，故可以將它調向右方，乘變除。4(5x) = 1005x = 100 / 4

2006-11-13 18:27:33 補充：
將同類項放在一邊，非同類項放在另一邊

5^(x + 1) = 100 + 5^x
5^x ．5^1 = 100 + 5^x
5(5^x) = 100 + 5^x
4(5^x) = 100
5^x = 25
5^x = 5^2
x = 2

你既問題係咪咁
5^(x + 1) = 100 + 5^x
5^x ．5^1 = 100 + 5^x
5(5^x) = 100 + 5^x
4(5^x) = 100
5^x = 25
5^x = 5^2
x = 2