1.2x-3=x+5 ..........2.Wskaż równanie tożsamościowe: a 2x+3=2x+1+2 b 2x=0 c 2x+3=-2x-3 d 2x+3=2x-3
1. 2x - 3 = x + 5
x = 8
2a) 2x + 3=2x + 1 + 2
2x - 2x = 1 + 2 - 3
0 = 0 - równanie tożsamościowe
b) 2x = 0
x = 0
c) 2x + 3= -2x - 3
4x = -6
x = -3/2
d) 2x + 3 = 2x - 3
0 ≠ -6
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1. 2x - 3 = x + 5
x = 8
2a) 2x + 3=2x + 1 + 2
2x - 2x = 1 + 2 - 3
0 = 0 - równanie tożsamościowe
b) 2x = 0
x = 0
c) 2x + 3= -2x - 3
4x = -6
x = -3/2
d) 2x + 3 = 2x - 3
0 ≠ -6