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

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

3t+4=t+13

3t-t=13-4

2t=9 / : 2

t=4.5