jawab yakkk pake cara....no 7 & 8 ;)

7.
a. 3x + 4y = 8
4y = -3x + 8
y = -3/4 x + 2 (m = -3/4, salah)

b. 4x - 3y = 6
-3y = -4x + 6
y = 4/3 x - 3 (m = 4/3, salah)

c. -8x - 6y = 5
-6y = 8x + 5
y = -8/6 x - 5/6
y = -4/3 x - 5/6 (m = -4/3, benar)

d. -3x + 4y = 8
4y = 3x + 8
y = 3/4 x + 2 (m = 3/4, salah)

8.
a. 3x + y - 7 = 0
y = -3x + 7 (m = -3, salah)

b. x + 3y - 6 = 0
3y = -x + 6
y = -1/3 x - 2 (m = -1/3, salah)

c. x - 3y + 9 = 0
-3y = -x - 9
y = 1/3 x + 3 (m = 1/3, benar)

d. 3x - y + 12 = 0
-y = -3x - 12
y = 3x + 12 (m = 3, salah)