Question

Write algebraic expression for the following:
When I multiply four-fifth of number $x$ to two-fifth of the sum of numbers $x^3$ and $y$, I obtain $4$ times $c$ subtracted from the sum of $y$ and $x$.

Answer 1

$\frac{4}{3}x+\frac{2}{5}(x^3+y)=(y+x)-4c$