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1) 5 (x-2)+6x=8x+11
2) -5x=18-7x


Răspuns :

1)5(x-2)+6x=8x+11
5x-10+6x=8x+11
11x-10=8x+11
3x=21
x=7

-5x=18-7x
2x=18
x=9