tolong buat jalan nya

no 1

5x+25 = 4x pangakt 2 - 100
5x + 25 = 4x . 4x - 100
x + 25 = 4x - 100
125 = 3x
41,7 = x

no 3

2x+ 4 = 5x + 20
-3x = 24
x = -8

(maaf kalau salah)