Hello there!
[tex]-2 = -5t + 10t + 2t\\[/tex]
Explanation:
↓↓↓↓↓↓↓↓↓
First you had to switch sides.
[tex]-5t+10t+2t=-2[/tex]
Then you add similar elements.
[tex]7t=-2[/tex]
Divide by 7 from both sides of the equation.
[tex]\frac{7t}{7}=\frac{-2}{7}[/tex]
Simplify it should be the correct answer.
[tex]t=-\frac{2}{7}[/tex]
Answer⇒⇒⇒⇒⇒t=-2/7
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-Charlie