Question

what is the value of t when 3t + 4 = t + 13

Answer 1

3t+4=t+13

3t-t=13-4

2t=9      /:2

t=4.5

Answer 2

To solve this just do the following
3t+4=t+13
Subtract 4 from each side
3t=t+9
Add like terms
2t=9 (we subtract because its on the other side of the equation)
Divide by 2
t=4.5
So your end answer is 4.5