Odpowiedź :
a) 10x + 4 = 7
10x = 7 - 4
10x = 3
x = 3/10
b) 4x - 3 = 9
4x = 9 + 3
4x = 12
x = 3
a) 10x + 4 = 7
10x = 7 - 4
10x = 3 |: 10
x = 0,3
b) 4x - 3 = 9
4x = 9 + 3
4x = 11 |: 4
x = 2,75
10x = 7 - 4
10x = 3 |: 10
x = 0,3
b) 4x - 3 = 9
4x = 9 + 3
4x = 11 |: 4
x = 2,75