Odpowiedź:
1
a) 3 + x = 2x - 5
-x = -8
x = 8
b) 5(t+6) - 2 = 8t
5t + 30 - 2 = 8t
-3t = -28
t = 9,33
2 B
3 5x - 4 + 4 = 31 + 4
5x = 35
C
4
a) 5x - 3 = 17
5x = 20
x = 4
b) 2x -5 + 3x = 7 +x - 4
5x - 5 = x +3
4x = 8
x = 2
5
x - beczka
x + (x+48) = 136
2x = 88
x = 44 - mniejsza beczka
44 + 48 = 92
92 + 44 = 136l
