Question

Tolong dijawab pakai cara

Answer 1

36. x1/20 = 6,2
x1 = 6,2 . 20
x1 = 124

x2/25 = 6,36
x2 = 6,36 . 25
x2 = 159
x2 - x1 = 159 - 124
= 35

rata2 5 anak = 35 / 5 = 7

37. 4 x 5 = 20
5 x 8 = 40
6 x 5 = 30
7 x n = 7n
8 x 2 = 16
9 x 2 = 18

20 + 40 + 30 + 7n + 16 + 18 = 124 + 7n
5 + 8 + 5 + n + 2 + 2 = 22 + n

(124 + 7n) / (22 + n) = 6
124 + 7n = 6(22 + n)
124 + 7n = 132 + 6n
7n - 6n = 132 - 124
n = 8

38. 220 + 150 + 200 = 570