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A.(2x-3)•6=54-6x
B. 512:(9x-19)-4=120:2


Răspuns :

(2x-3)*6=54-6x
12x-18=54-6x
12x+6x=54+18
18x=72
x=4

512:(9x-19)-4=120:2
512:9x-19=60+4
512=64*(9x-19)
9x-19=512:64
9x-19=8
9x=8+19
9x=27
x=3





( 2x-3) ori  6=54-6x
12x-18=54-6x
12+6x=54+18
18x=72
x=4
imi pare rau , dar pe B nu il stiu !!!