Hej!
-(2x - 1) = 4
-2x + 2 = 4
-2x = 4 - 2
-2x = 2 / : (-2)
x = -1
2(x + 1) = x
2x + 2 = x
2x - x = -2
x = -2
2t - (3t + 1) = 6
2t - 3t - 1 = 6
2t - 3t = 6 + 1
-t = 7 / : (-1)
t = -7
-(4 + x) = 2(3 - x)
-4 - x = 6 - 2x
-x + 2x = 6 + 4
x = 10
3(y + 6) - y = 2(y + 9)
3y + 18 - y = 2y + 18
3y - y - 2y = 18 - 18
0 = 0
Równanie tożsamościowe, ma nieskończenie wiele rozwiązań.
x - 7 - 2(3x + 5) = 3
x - 7 - 6x - 10 = 3
x - 6x = 3 + 7 + 10
-5x = 20 / : (-5)
x = -4
Pozdrawiam! - Julka
