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jawab

(2x + y)/4  + (-x + 2y)/16 = - 1 ...kalikan 16
4(2x + y) + (-x + 2y) = - 16
8x + 4y - x + 2y  = - 16
7x + 6y = - 16 ...(i)

(3x + 2y)/(2)  - (-x + 2y)/3 = 2...kalikan 6
3(3x + 2y) - 2(-x + 2y) =  12
9x +6y + 2x - 4y = 12
7x + 2y = 12 ..(ii)

(i) dan (ii)
7x + 6y = - 16
7x + 2y = 12 .....(-)
4y = - 28
y = - 7

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