Zadanie
-5x + 3= -12 l -3
-5x = -15 l :(-5)
x = 3
y/3 + 1/2 = 5/6 l ·6
2y + 3 = 5 l -3
2y = 2 l :2
y = 1
(3y + 2)/4 = 2y + 3 l ·4
3y + 2 = 8y + 12 l -2
3y = 8y + 10 l -8y
-5y = 10 l :(-5)
y = -2
5(x + 1) = 2(x + 3) + x + 4
5x + 5 = 2x + 6 + x + 4
5x + 5 = 3x + 10 l -5
5x = 3x + 5 l -3x
2x = 5 l :2
x = 2,5
