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Rezolva ecuatiile a) (2x-3)·6=54-6x. b)512:(9x-19)-4=120:2

Răspuns :

a) (2x-3)·6=54-6x;
12x-18=54-6x;
12x+6x=54+18;
18x=72;
x=72:18;
x=4=>S={4};
b)512:(9x-19)-4=120:2;
512:(9x-19)=60+4;
512:(9x-19)=64;
9x-19=512:64;
9x-19=8;
9x=8+19;
x=27:9;
x=3=>S={3}
(2x-3)·6=54-6x
12x-18=54-6x
18x=72
x=4


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

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