tentukan hp 4x - 1/2 y = 3 12x + 7y= 26

(4x - 1/2 y = 3) x 3
= 12x - 3/2y = 9

12x - 3/2y - 9 - (12x + 7y - 26)
= -17/2y = 17
y= -2

4x - 1/2y = 3
4x + 1 = 3
x = 1/2