Sprawdź, która z liczb -2, -1,5, - 3/4, 0, 1, 5, 8,-1 spełnia podane równanie. a)2x+5=x+4 b)6x=1/2x+81/4 c)2x-3=(x-4)+(x+1)
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a)
2x+5=x+4
2x-x=4-5
x=-1
b)
6x=1/2x+81/4
6x-1/2x=8 1/4
5 1/2x=8 1/4
11/2x=33/4 /*2/11
x=3/2
x=1 1/2
c)
2x-3=(x-4)+(x+1)
2x-3=x-4+x+1
2x-3=2x-3
2x-2x=-3+3
0=0
a)2x+5=x+4
x= -1
b)6x=1/2x+81/4
c)2x-3=(x-4)+(x+1)
0=0