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h(x) = 7x+4
3g(3) + 2h(n) = 13
3(5(3)-2n) + 2(7(n)+4) = 13
45-6n + 14n+8 = 13
53+8n = 13
8n = 13-53 = -40
n = -40/8 = -5
g(3-5) = 5(3-5)-2(-5) = -10+10 = 0
jadi jawabannya adalah B