Sprawdz kture równanie spełnia liczba -5.
a) 4a+15=-5
b)m+5=-10
c)2x-7=4x+3
A) 4a+15=-5
4a=-5-15
4a=-20/4
a=5
B)nw
C) 2x-7=4x+3
2x-4x=3+7
-2x=10/-2
x=-5
a)4a=5-15
4a=(-10)/:4
a=-2,5
b)m= -10-5
m=-15
c) 2x-4x=7+3
-2x=10/(-2)
x= -5
ODP:C
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A) 4a+15=-5
4a=-5-15
4a=-20/4
a=5
B)nw
C) 2x-7=4x+3
2x-4x=3+7
-2x=10/-2
x=-5
a)4a=5-15
4a=(-10)/:4
a=-2,5
b)m= -10-5
m=-15
c) 2x-4x=7+3
-2x=10/(-2)
x= -5
ODP:C