Odpowiedź:
a) 7x - 12 = 3x - 2 /+12
7x = 3x + 10 /-3x
7x = 10 /:7
x = 1 3/7
b) 2(3x - 2) = x + 6
6x - 4 = x + 6 /+4
6x = x + 10 / -x
5x = 10 /:5
x = 2
d) -3(7x + 2) - 2x = 5(x - 3) - (2 + x)
-21x - 6 - 2x = 5x - 15 - 2 - x /-5x
-28x - 6 = -17 - x /-x
-29x - 6 = -17 /+6
-29x = -11 /:(-29)
x = 11/29
/ - kreska ułamkowa
