Question

Determinati multimile:
A={ x apartine lui Z: 2x-1=3}
B={x apartine lui Q*: 2/3x -1/2=-0,5
C={ x apartineN* : 7/9x- 1/3=11/9}
D={x apartine lui Q-N :11/12x=0}
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Answer 1

A = { 2x=3+1 // 2x=4 // x=4:2 // x=2 }