Antwort
√7x -1,5 = 3
√7x = 3 +1,5
7x = 4,5²
x= 4,5²/7
x= 2,89285714
√7x -1,5 = 37x-1,5= 3²
7x = 9-1,5
x= 7,5/7
x= 1,0714285