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4(x+1)=2(x+6) =
4x+4=2x+12 =
4x-2x=12-4
2x=8 //:2
x=4
2(8-x)-3(9-x) = 0
16-2x-27+3x = 0
-2x+3x=0-16+27
x=11
Mam nadzieję, że jest dobrze:)