Matematică
acunos
3

4x+1/2=5,x apartine Q 9/2x+2=1/2,x apartine Q 4(3x+1)=0,x apartine Q Rezolvati ecuatiile: 3x=12,x apartine Z -3x=1,x apartine Q X+2=1,x apartine N X-4=1/2,x apartine Q 4/3x=5,x apartine Q 5/6y=1,y apartine Q -1=2/3t , t apartine Q -4/7y=8,y apartine Z 2/3x+1=5/3,x apartineQ

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(1) Răspunsuri
Simona111

1) 4x+0,5=5⇔4x=5-0,5⇔4x=4,5⇔x=1,125    2) 4,5x+2=0,5⇔4,5x=-1,5⇔x=-1/3 3) 3x+1=0⇔3x=-1⇔x=-1/3      4) x=12/3 ⇔x=4   5) x=-1/3   6) x=1-2⇔x=-1  7) x=0,5+4⇔x=4,5   8) (4/3)·x=5 |·3⇔4x=15⇔x=15/4   9) (5/6)·y=1 |·6⇔5y=6⇔y=6/5   10) -1=(2/3)·t |·3⇔-3=2t⇔t=-3/2   11) -(4/7)·y=8 |·7⇔-4y=56⇔y=-14   12) (2/3)·x+3/3=5/3 |·3⇔2x+3=5⇔2x=2⇔x=1  

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