Try This! (Solving Equations Solutions)
1. \[15x + 25 = 225\]\[15 x = 200\]\[x = 13 \frac{1}{3}\]
It will take \(14\) weeks to have enough money to buy the bike.
2. \[15x + 25 (2x) = $7800\]\[65x = $7800\]\[x = 120\]
They sold \(120\) tee-shirts for \($15\) and \(240\) tee-shirts for \($25\).
3. \[ax + by = c\]\[by = -ax + c\]\[y = -\frac{a}{b} x + \frac{c}{b}\]
Go to Watch (Literal Equations)