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4x - 3 = 3x + 5
4x - 3x = 5 + 3
x = 8
Spr.
L = 4 * 8 - 3 = 32 - 3 = 29
P = 3 * 8 + 5 =24 + 5 = 29
L = P
b)
8x - (1 + 2x) = 2(3x - 0,5)
8x - 1 - 2x = 6x - 1
6x - 6x = -1 + 1
0 = 0, równanie tożsamościowe, nieskończenie wiele rozwiązań
Spr.
np.: dla:
x = 1
L = 8 *1 - (1 + 2*1) = 8 - 3 = 5
P = 2(3 *1 - 0,5) = 2 * 2,5 = 5
L = P