a) 3x+1 = 8 -2x +1 1/2 (jedna cała i jedna druga )
b) 4-y = 13 = 4y +2
c) a -2 = 2a -4
d) 3(x+1)-5(x+1)=0
Daję NAJ
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3x+2x=8+1 1/2-1
5x=8 1/2 / :5
x=1,7.
b) nie umiem xD
c) a-2=2a-4
a-2a=-4+2
-a=-2 /: -1
a=2
d) 3(x+1)-5(x+1)=0
3x+3-5x-5=0
3x-5x=0+5-3
-2x=2 /: -2
x=-1
Proszę ;).