Odpowiedź:
2. a) x/5 = 11 /*5
X = 55
b) A. y + 1 = 44
y = 43
3. 14 + x = 14
X = 14 – 14
X = 0
B. x – 3 = 1
X = 1 + 3
X = 4
C. 5,6x = 0 /:5,6
x = 0
D. 5x = x
5x – x = 0
4x = 0 /:4
Odp: b
4. 0,75y = 57 /:0,75
Y = 76
5.
a) 5x – 8 = 12
5x = 12 + 8
5x = 20 /:5
b) 3x – 4 = x + 6
3x – x = 6 + 4
2x = 10 /:2
X = 5
c) 3(x + 4) = 2x – 7
3x + 12 = 2x – 7
3x – 2x = -7 - 12
X = -19
Szczegółowe wyjaśnienie:
