Question

tìm x

C=\(\frac{10}{3x-2}€Z\)

Answer 1

Để C\(\in\)Z

=>10 chia hết cho 3x-2

=>3x-2\(\in\)Ư(10)={-1,-2,-5,-10,1,2,5,10}

=>3x\(\in\){1,0,-3,-8,3,4,7,13}

Vì 3x chia hết cho 3

=>3x={0,-3,3}

=>x={0,-1,1}

Vậy x=0,-1,1

Answer 2

123 + 345 = 468

468 + 567 = 1035

1035 - 236 = 799

799 - 189 = 610

610 + 853 = 1463