4t^2/5=t/5+3/10

= t=3/4, t=-1/2

4t^2/5 = t/5 + 3/10,

Multiply both sides by 10:
8t^2 = 2t + 3,
8t^2 - 2t -3 = 0,

t = 3/4, and -1/2.