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Verified answer
Jawabx - 3y = 12....kali 2
2x + 5y = 2
2x - 6y =24
2x+ 5y = 2......(-)
-11y = 22
y = - 2
2x + 5y = 2
2x - 10 = 2
2x = 12
x = 6
a = x = 6
b = y = -2
nilai 2a - b = 2(6) - (-2) = 12 + 2 = 14