Odpowiedź :
a)
7x + 5 = 3x + 11
7x - 3x = 11 - 5
4x = 6 /:4
x = [tex]\frac{6}{4}[/tex]
x = 1,5
b)
9x + 4 = 4x + 16
9x - 4x = 16 - 4
5x = 12 /:5
x = [tex]\frac{12}{5}[/tex]
x = 2,4
c)
11x + 7 = 4x + 28
11x - 4x = 28 - 7
7x = 21 /:7
x = 3
a)
7x + 5 = 3x + 11
7x - 3x = 11 - 5
4x = 6 /:4
x = [tex]\frac{6}{4}[/tex]
x = 1,5
b)
9x + 4 = 4x + 16
9x - 4x = 16 - 4
5x = 12 /:5
x = [tex]\frac{12}{5}[/tex]
x = 2,4
c)
11x + 7 = 4x + 28
11x - 4x = 28 - 7
7x = 21 /:7
x = 3