Odpowiedź :
a) 2x - 5 = 87
2x = 87 + 5
2x = 92
x = 46
b) 16 + 5x = 41
5x = 41 - 16
5x = 25
x = 5
c) 4y - 6,4 = -25,6
4y = -25,6 + 6.4
4y = -19.2
y = -4.8
d) 8x - 5x - 6x = 7
3x - 6x = 7
-3x = 7
x = -7/3
a) 2x - 5 = 87
2x = 87 + 5
2x = 92
x = 46
b) 16 + 5x = 41
5x = 41 - 16
5x = 25
x = 5
c) 4y - 6,4 = -25,6
4y = -25,6 + 6.4
4y = -19.2
y = -4.8
d) 8x - 5x - 6x = 7
3x - 6x = 7
-3x = 7
x = -7/3