Odpowiedź :
a)
[tex] - 7x - 8 = 18 \\ - 7x = 26 \: | \div - 7 \\ x = - 3\frac{5}{7} [/tex]
b)
[tex] \frac{1}{3} x + 12 - 2 \frac{1}{2}x = 38 \: | \times 6 \\ 2x + 72 - 15x = 228 \\ - 13x = 156 \: | \div - 13 \\ x = - 12[/tex]
a) - 7x – 8 =18
-7x=26/:(-7)
x=-26/7= -3 5/7
b) 1/3 x + 12 - 2 1/2 x = 38
1/3x-2 1/2x=26
2/6x -2 3/6x= 26
-2 1/6x=26
-13/6x=26/*(-6/13)
x=-12