Odpowiedź :
g) x - 2 = 8 | +2
x = 10
Spr: 10 - 2 = 8
h) c - 10 = 13 | +10
c = 23
Spr: 23 - 10 = 13
i) x + 7 = 9 | -7
x = 2
Spr: 2 + 7 = 9
j) s - 9 = 6 | +9
s= 15
Spr: 15 - 9 = 6
k) 7 + x = 15 | -7
x = 8
Spr: 7 + 8 = 15
l) k + 3 = 7 | -3
k = 4
Spr: 4 + 3 = 7
Odpowiedź:
g) x - 2 = 8 | +2
x = 10
Spr: 10 - 2 = 8
h) c - 10 = 13 | +10
c = 23
Spr: 23 - 10 = 13
i) x + 7 = 9 | -7
x = 2
Spr: 2 + 7 = 9
j) s - 9 = 6 | +9
s= 15
Spr: 15 - 9 = 6
k) 7 + x = 15 | -7
x = 8
Spr: 7 + 8 = 15
l) k + 3 = 7 | -3
k = 4
Spr: 4 + 3 = 7
Szczegółowe wyjaśnienie: