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2x - 1 - x + 3 = 3
x + 2 = 3
x = 1
b) 0,5( 2 - 4x) = 3 - x
1 - 2x = 3 - x
-2x + x = 2
-x = 2
x = -2
Mam nadzieję, że pomogłam :)