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Equacions de primer grau
Autor :
Joana Mª Mogort Oltra
9x-27=0
x+x-9=39
-20+5x=10
-5x+2= 20X-48
5x+50=2x+5
4x-2=0
X=15
x=-15
x=6
X=3
X=0.5
x=2
