## Try This! (Solving Equations Solutions)

1. \[\begin{align}15x + 25 &= 225\\\\15 x &= 200\\\\x &= 13 \dfrac{1}{3}\end{align}\]

It will take \(14\) weeks to have enough money to buy the bike.

2. \[\begin{align}15x+25 (2x) &= $7800\\\\65x &= $7800\\\\x &= 120\end{align}\]

They sold \(120\) tee-shirts for \($15\) and \(240\) tee-shirts for \($25\).

3. \[\begin{align}ax + by &= c\\\\by &= -ax + c\\\\y &= -\dfrac{a}{b} x + \dfrac{c}{b}\end{align}\]

**Go to Watch (Literal Equations)**