Sprawdź, czy liczba -4 spełnia dane równania.Zaznacz TAK lub NIE.
a)3x+7=-5
L=........
p=........ TAK/NIE
b)-8x+4=-5x+16
L=.........
P=.........TAK/NIE
c)2(x+6)=-4
L=.........
p=.........TAK/NIE
d)5-x=2x+9
L=..........
p=..........TAK/NIE
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a)
3x + 7 = -5
L = 3·(-4) + 7= - 12 + 7 = -5
P = -5
TAK/NIE
b)
-8x + 4 = -5x + 16
L = -8·(-4) + 4 = 32 + 4 = 36
P = -5·(-4) + 16 = 20 + 16 = 36
TAK/NIE
c)
2·(x+6) = - 4
L = 2·(- 4+6) = 2 · 2 = 4
P = - 4
TAK/NIE
d)
5 - x = 2x + 9
L = 5 - (- 4) = 5 + 4 = 9
P = 2·(- 4) + 9 = - 8 + 9 = 1
TAK/NIE