## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$t=\frac{2s}{v_1+v_2}$
Multiply $2$ to both sides of the equation: $2(s)=2 \cdot \frac{(v_1+v_2)t}{2} \\2s= (v_1+v_2)t$ Divide $v_1+v_2$ to both sides of the equation: $\frac{2s}{v_1+v_2} = \frac{(v_1+v_2)t}{v_1+v_2} \\\frac{2s}{v_1+v_2}=t$