Question

Tolong jawab secepatnya pakai cara... Soalnya besok kumpul... Yang pakar tolong dong.. Thx Before

Answer 1

1) ½x + 3 = 9 --> ×2
x + 6 = 18
x = 18 - 6
x = 12

2) ⅓x - 5 = 10 --> ×3
x - 15 = 30
x = 30 + 15
x = 45

3) ¼y + ½ = 7 ---> ×4
y + 2 = 14
y = 12

4) ¾y - 1/5 y = 2 ---> ×20
15y - 4y = 40
11y = 40
y = 40/11

5) 1/x - ½ = ⅓ ---> × 6X
6 - 3x = 2x
-3x - 2x = -6
-5x = -6
x = 6/5

6) p/2 = p/7 - 10 --> × 70
35p = 10p - 700
35p - 10p = -700
25p = -700
p = - 28

8) ½(4q - 5) = q + 5¼ --> ×4
2(4q - 5) = 4q + 21
8q - 10 = 4q + 21
8q - 4q = 21 + 10
4q = 31
q = 31/4

9) ¾(n+4)- ⅔(¾-n)=½ -->×12
9(n+4)-8(9-n) = 6
9n + 36 - 72 + 8n = 6
17n = 6 + 36
17n = 42
n = 42/17

10) 6,2x - 7,1 = 5,3
6,2x = 5,3 + 7,1
6,2x = 12,4
x = 2