A can finish a work in 18 days. B is twice as efficient as A. If they work together, in how many day

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Download lagu A can finish a work in 18 days. B is twice as efficient as A. If they work together, in how many day secara gratis hanya untuk keperluan promosi. Dukung artis favorit kamu dengan membeli musik original di iTunes atau platform resmi lainnya.