Odpowiedź :
a) x +14 = 20
x = 20 - 14
x = 6
b) x - 15 = 34
x = 34 + 15
x = 49
c) x - 5 = 2
x = 2 + 5
x = 7
d) x - 16 = 29
x = 29 + 16
x = 45
e) 14 + x = 11
x = 11 - 14
x = (-3)
f) x + 17 = 23
x = 23 - 17
x = 6
g) 4 + x = 3
x = 3 - 4
x = (-1)
h) 13y = 39/:13
y = 3
i) 4y = 12/:4
y = 3
j) 1/2x = -3/:1/2
x = -6
Licze na naj :))
x = 20 - 14
x = 6
b) x - 15 = 34
x = 34 + 15
x = 49
c) x - 5 = 2
x = 2 + 5
x = 7
d) x - 16 = 29
x = 29 + 16
x = 45
e) 14 + x = 11
x = 11 - 14
x = (-3)
f) x + 17 = 23
x = 23 - 17
x = 6
g) 4 + x = 3
x = 3 - 4
x = (-1)
h) 13y = 39/:13
y = 3
i) 4y = 12/:4
y = 3
j) 1/2x = -3/:1/2
x = -6
Licze na naj :))