Question

Matematyka kl 6 w załączniku proszę na jutro :]

Answer 1

3x + 6 = -3x - 6 |+ 3x

3x + 3x + 6 = -6 |-6

6x = -6 - 6

6x = -12 |:6

x = -2

L= 3 • (-2) + 6 = -6 + 6 = 0

P= -3 • (-2) - 6 = 6 - 6 = 0

L=P

-7x + 8 = 2 - 4x |+ 4x

-7x + 8 + 4x = 2 |- 8

-3x = 2 - 8

-3x = -6 |: (-3)

x = 2

L= (-7) • 2 + 8 = -14 + 8 = 6

P= 2 - 4 • 2 = 2 - 8 = 6

L=P

-2x + 7 = -6x - 5 |+ 6x

-2x + 7 + 6x = -5 | -7

4x = -5 - 7

4x = -12 |: 4

x = -3

L= -2 • (-3) +7 = 6 + 7 = 13

P= -6 • (-3) - 5 = 18 - 5 = 13

L=P