rowniania PLS HELP 7KLASA DAJE NAJ​



Rowniania PLS HELP 7KLASA DAJE NAJ class=

Odpowiedź :

a)

[tex]2(x + 3) = 10 \\ 2x + 6 = 10 \\ 2x = 4 \\ x = 2[/tex]

b)

[tex]3(x - 1) + 2 = 8 \\ 3x - 3 + 2 = 8 \\ 3x = 9 \\ x = 3[/tex]

c)

[tex]2(13 - x) - 9 = 1 \\ 26 - 2x - 9 = 1 \\ - 2x = - 16 \\ x = 8[/tex]

d)

[tex]3(1 - x) + 2 = - 7 \\ 3 - 3x + 2 = - 7 \\ - 3x = - 12 \\ x = 4[/tex]

e)

[tex]5 - 2(x + 2) = 9 \\ 5 - 2x - 4 = 9 \\ - 2x = 10 \\ x = - 5[/tex]

f)

[tex] - 2 - (4 - 3x) = - 7 \\ - 2 - 4 + 3x = - 7 \\ 3x = - 1 \\ x = - \frac{1}{3} [/tex]

g)

[tex]9 = 5 - 4(2x - 5) \\ 9 = 5 - 8x + 20 \\ - 16 = - 8x \\ x = 2[/tex]

h)

[tex]0 = 6 - 3(5 + 2x) \\ 0 = 6 - 15 - 6x \\ 9 = - 6x \\ x = - \frac{9}{6} [/tex]

i)

[tex] - 1 = - 4 + 2(1 - 5x) \\ - 1 = - 4 + 2 - 10x \\ 10 x = - 1 \\ x = - \frac{1}{10} [/tex]