Odpowiedź :
a) x = 2
3x + 1 = 3 × 2 + 1 = 6 + 1 = 7
b) y = 3
10 - 4y = 10 - 4 × 3 = 10 - 12 = -2
c) a = 4
a(a + 1) = 4(4 + 1) = 4(5) = 20
d) x = 0
3(5 + x) = 3(5 + 0) = 3(5) = 15
a) x = 2
3x + 1 = 3 × 2 + 1 = 6 + 1 = 7
b) y = 3
10 - 4y = 10 - 4 × 3 = 10 - 12 = -2
c) a = 4
a(a + 1) = 4(4 + 1) = 4(5) = 20
d) x = 0
3(5 + x) = 3(5 + 0) = 3(5) = 15