Question

Kak, mohon bantuannya ya.

Answer 1

persamaan pertama

x / y = 3/4

x = 3/4 y

persamaan kedua

(x + 3) / (y + 2) = 2/3

3 (x + 3) = 2 (y + 2)

3x + 9 = 2y + 4

3x - 2y = 4 - 9

masukkan nilai x

3 ( 3/4 y ) - 2y = -5

9/4 y - 2y = -5

9/4 y - 8/4 y = -5

1/4 y = -5

y = -5 × 4

y = -20

Answer 2

x = 3a, y = 4a

(x+3)/(y+2) = 2/3

(3a+3)/(4a+2) = 2/3

3/2 . (a+1)/(2a+1) = 2/3

(a+1)/(2a+1) = 4/9

9(a+1) = 4(2a+1)

9a+9 = 8a+4

a = 4-9 = -5

y = 4a

y = 4.(-5) = -20