Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
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?

### Response:
 Hebu x iwe idadi ya miaka ambayo Tom amekuwa akifundisha
Devin amekuwa akifundisha kwa miaka (1/2)x-5
70=x+((1/2)x-5)
70=(3/2)x-5
75=(3/2)x
x=<<50=50>>50
Tom amekuwa akifundisha kwa miaka 50