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?
Let x be the number of years Tom has been teaching
Devin has been teaching for (1/2)x-5 years
70=x+((1/2)x-5)
70=(3/2)x-5
75=(3/2)x
x=<<50=50>>50
Tom has been teaching for 50 years
#### 50