Question

DAJE NAJ I 100 PUNKTOW NA TERAZ
​

Answer 1

1.

x + 1 = 1 + 1 + 1

x + 1 = 3

Odp. B.

2.

9x - 6 = 8x + 4

9x - 8x = 4 + 6

x = 10

3.

a)

3x + 4 = 16

3x = 16 - 4

3x = 12   /:3

x = 4

b)

6x - 5 = x + 4

6x - x = 4 + 5

5x = 9   /:5

x = 9/5

x = 1⁴/₅

c)

3(x + 5) = 2x - 4

3x + 15 = 2x - 4

3x - 2x = -4 - 15

x = -19

4.

x - wiek Jurka

x + 6  -  wiek brata Jurka

x + x + 6 = 22

2x = 22 - 6

2x = 16   /:2

x = 8 lat  →  wiek Jurka

x + 6 = 8 + 6 = 14 lat  →  wiek brata Jurka

Odp. Bracia mają 8 lat i 14 lat.