Selesaian sistem persamaan 2x + 3y = 12 dan 3x + 2y = 8 adalahx = a dan y = b.nilai a + b adalah

Jawaban:

2x + 3y = 12 |×3

3x + 2y = 8 |×2

6x + 9y = 36

6x + 4y = 16

__________ _

5y = 20

y = 4

2x + 3y = 12

2x + 3(4) = 12

2x = 0

x = 0

a = x = 0

b = y = 4

a + b = 0 + 4 = 4