Tentukan selesaian dari sistem persamaan dengan eliminasi berikut. b. -2x + 3y = 7 5x + 8y = -2 d. 5x = 4y + 8 3y= 3x - 3

-2x + 3y = 7. (x-5)
5x + 8y = -2. (x 2)

i) 10x - 15y = -35
10x + 16y = -4
_____________-
-31y = -31
y. = 1

ii) -2x + 3(1) = 7
-2x = 7 - 3
-2x = 4
x = 4/-2
x = -2

5x = 4y + 8. (dijadikan a + b = c)
3y = 3x - 3

i) 5x - 4y = 8. (x -3)
-3x + 3y = -3. (x 5)

-15x + 12y = -24
-15x + 15y = -15
____________-
-3y = -9
y = -9/-3
y = 3

-3(3) = 3x -3
-9 = 3x -3
-9 + 3 = 3x
-6 = 3x
-6/3 = x
-2 = x

(semoga membantu, maaf kalau salah ya)