3t - 7 = 5t, then 6t =

3t-7=5t

so add 7 to both sides

3t=5t+7

-5t - 5t

-2t=7

/-2 / - 2

t=-3.5

6t=

6 (-3.5)

-21

First, you would need to solve for t using the equation: 3t - 7 = 5t

Move all the numbers with variable on ones side

-7 = 5t - 3t

Combine like factors

-7 = 2t

Solve for t

-7/2 = t

After solving for t, you plug the answer into the equation you want to solve.

6 (-7/2) = - 21

6*-7 = - 42

-42/2 = - 21

The answer is - 21