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Verified answer
3x + 4y = -462x = 5y diubah menjadi 2x - 5y= 0
3x + 4y = -46 dikali 2
2x - 5y = 0 dikali 3
6x + 8y = -92
6x - 15y = 0 (-)
23y = -92
y = - 4
3x + 4y = -46
3x + 4(-4)= -46
3x - 16 = -46
3x = -46 + 16
x = -30/3
x= -10
jadi 4x - 3y = 4(-10) - 3(-4) = -28 (b)