Question

raspunde-ti urgent va rog dau inima!!!!!​

Answer 1

Din formula suma mezilor = suma extremilor rezulta

27.  3 ori 15 = 5(3x - 2)

45 = 5(3x - 2)

9 = 3x - 2

3x = 11

x = 11/3

28. 4(5 - 2x) = 10

2(5 - 2x) = 5

10 - 4x = 5

4x = 5

x = 5/4

29. 6 = 4(3 + 5x)

3 = 2(3 + 5x)

3 = 6 + 10x

10x = -3

x = -3/10

30. (6x - 11)5 = 42

30x - 55 = 42

30x = 97

x = 97/30