 
<translate> Lizzy: Tom da Devin sun yi shekara 70 suna koyarwa. Devin ya kasance yana koyarwa na shekaru 5 kasa da rabin adadin shekarun da Tom yake da shi. Shekaru nawa ne Tom yake koyarwa? Ni: Hmmm, bari in yi tunani. Ina ganin wannan shi ne cikakken bayani: <eng> Lizzy: Tom and Devin have been teaching for a total of 70 years. Devin has been teaching for 5 less than half the number of years that Tom has. How many years has Tom been teaching?.
Me: Hmmm, let me think. I think this is the detailed solution: 