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mungkin kyk gini 9x + 3 = 66 klo ini bisa dcari nilai x nya
9x + 3 = 66
9× = 66 - 3
9× = 63
× = 63 / 9
× = 7
45 + 3y = 90
3y = 90 - 45
3y = 45
y = 45 / 3
y = 15