Question

Tolong bantuin gue dongg . Gue kasih poin banyak nihh yang bantu gue . Ini tugas matematika dan gue gak tau caranya , tolong kerjain nya pake cara yaa . Kerjain soalnyaa 1-5 doangg kok gak banyak=D . Terimakasih sebelumnya ya yg udah bantuin gue .

Answer 1

1. 1/2x + 3 = 9
   1/2(12) + 3 = 9
   6 + 3 = 9

Answer 2

²1. 1/2 x + 3 = 9
    x/2 + 6/2 = 9
    (6+x)/2 = 9
    6+x = 9 x 2
    6+x = 18
    x = 18-6 = 12
2. 1/3 x + 5 = 10
   1/3 x + 15/3 = 10
   (15+x)/3 = 10
   15 + x = 10 x 3
   15 + x = 30
   x = 30-15=15
3. 1/4 y + 1/2 = 7
    y/4 + 2/4 = 7
    (2+y)/4 = 7
    2 + y = 7x4
    2+y = 28
    y= 28-2=26
4. 3/4 y - 1/5 y = 2
    3y/4 - y/5 = 2
    (15y-4y)/20 = 2
    11y = 2x20
    y = 40/11 = 3 7/11
5. 1/x - 1/2 = 1/3
    (2-x)/2x = 1/3
    2-x = 1/3 x 2x
    2-x = 2x/3
    2x/3 = 2-x
   2x/3 + x = 2
    (2x²+3x)/3x = 2
    2x² + 3x = 2 x 3x
    bingung +_+ no 4 coba cek lagi ya