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2(1) + 4y = 9
2+4y = 9
4y = 9-2
4y = 7
y = 7/4 = 1 3/4
ada jawabannya?
ganti x jadi 1
2(1) + 4y = 9
2 + 4y = 9
4y = 9-2
4y = 7
y = 7/4