Question

Tick (✓) the correct answer:
If 3(t − 3) = 5(2t + 1), then t = ?
(a) −2
(b) 2
(c) −3
(d) 3

Answer 1

(a) -2

$$\begin{gathered} 3(t-3)=5(2t+1) \\ \Rightarrow 3t-9=10t+5 \\ \Rightarrow 3t-10t=9+5 \\ \Rightarrow -7t=14 \\ \Rightarrow -t=\frac{14}{7}=2 \\ \Rightarrow t=-2 \end{gathered}$$